Research Interests
Hidden Order 
URu2Si2 
The material URu2Si2 has been a subject of
long-standing interest since the discovery of a phase transition
at 17.5 K, 30 years ago. Initially thought to be
an antiferromagnetic transition, the small antiferromagnetic
moment of 0.03 μB that arises in this material is far too small
to account for the large specific heat jump. Three
decades of research have failed to
determine the order parameter, leading to this phase being
dubbed the “hidden order” phase.
Neutron scattering has played an important role in determining the properties of the hidden order phase. For example, within the paramagnetic phase above the transition, inelastic neutron scattering measurements observed gapless, weakly dispersing features that become gapped and more intense in the “hidden order” phase. It was determined that the gapping of these excitations results in an entropy change of sufficient size to account for the specific heat jump. Thus, it has been cited as a possible “signature” of the hidden order state in neutron scattering experiments. Additionally, neutron scattering is highly sensitive to conventional magnetic orders that arise when the system is perturbed (with magnetic field, pressure, etc).
My work on URu2Si2 focuses on the elastic and inelastic neutron scattering signatures of the “hidden order” phase across various transitions driven by temperature, chemical and hydrostatic pressure, and magnetic field, in an effort to understand the connection the missing order parameter has to other magnetic symmetries.
Selected Publications:
Neutron scattering has played an important role in determining the properties of the hidden order phase. For example, within the paramagnetic phase above the transition, inelastic neutron scattering measurements observed gapless, weakly dispersing features that become gapped and more intense in the “hidden order” phase. It was determined that the gapping of these excitations results in an entropy change of sufficient size to account for the specific heat jump. Thus, it has been cited as a possible “signature” of the hidden order state in neutron scattering experiments. Additionally, neutron scattering is highly sensitive to conventional magnetic orders that arise when the system is perturbed (with magnetic field, pressure, etc).
My work on URu2Si2 focuses on the elastic and inelastic neutron scattering signatures of the “hidden order” phase across various transitions driven by temperature, chemical and hydrostatic pressure, and magnetic field, in an effort to understand the connection the missing order parameter has to other magnetic symmetries.
Selected Publications:
T.J. Williams, H. Barath, Z. Yamani, J.A. Rodriguez-Riviera, J.B. Leao, J.D. Garrett, G.M. Luke, W.J.L. Buyers and C. Broholm. (2017) Gapped Excitations in the High-Pressure Antiferromagnetic Phase of URu2Si2. Physical Review B. 95, 195171. DOI:10.1103/PhysRevB.95.195171
T.J. Williams, M.N. Wilson, A.A. Aczel, M.B. Stone and G.M. Luke. (2017) Hidden Order Signatures in the Antiferromagnetic Phase of U(Ru1-xFex)2Si2. Physical Review B. 95, 104440. DOI:10.1103/PhysRevB.95.104440
D.R. Gardner, C.J. Bonnoit, R. Chisnell, A.H. Said, B.M. Leu, T.J. Williams, G.M. Luke and Y.S. Lee. (2016) Inelastic x-ray scattering measurements of phonon dynamics in URu2Si2. Phys. Rev. B. 93 075123. DOI:10.1103/PhysRevB.86.235104
M.N. Wilson, T.J. Williams, Y.-P. Cai, A.M. Hallas, T. Medina, T.J. Munsie, S.C. Cheung, B.A. Frandsen, L. Liu, Y.J. Uemura and G.M. Luke. (2016) Antiferromagnetism and Hidden Order in Isoelectronic Doping of URu2Si2. Phys. Rev B. 93 064402. DOI:10.1103/PhysRevB.93.064402
S. Chatterjee, J. Trinckauf, T. Hanke, D.E. Shai, J.W. Harter, T.J. Williams, G.M. Luke, K.M. Shen and J. Geck. (2013) Formation of the coherent heavy fermion liquid at the ‘hidden order’ transition in URu2Si2. Physical Review Letters. 110 186401. DOI:10.1103/PhysRevLett.110.186401
U. Nagel, T. Uleksin, T. Room, R.P.S.M. Lobo, P. Lejay, C.C. Homes, J. Hall, A.W. Kinross, S. Purdy, T.J. Williams, G.M. Luke and T. Timusk. (2011) The Normal State of URu2Si2: Spectroscopic Evidence for an Anomalous Fermi Liquid. Proceedings of the National Academy of Sciences of the United States of America (2012) 109 19161. DOI:10.1073/pnas.1208249109
T.J. Williams, N.P. Butch, G.M. Luke, M.B. Maple, Z. Yamani and W.J.L. Buyers. (2012) Neutron Scattering Study of URu2-xRexSi2 with x=0.10: Driving Order Towards Quantum Criticality. Physical Review B 86 235104. DOI:10.1103/PhysRevB.86.235104
W.T. Guo, Z.G. Chen, T.J. Williams, J.D. Garrett, G.M. Luke and N.L. Wang. (2012) Hybridization Gap versus Hidden Order Gap in URu2Si2 as Revealed by Optical Spectroscopy. Physical Review B 85 195105. DOI:10.1103/PhysRevB.85.195105
J.S. Hall, T.J. Williams, G.M. Luke, U. Nagel, T. Uleskin, T. Room and T. Timusk. (2012) Observation of Multiple-Gap Structure in Hidden Order State of URu2Si2 from Optical Conductivity. Physical Review B 86 035132. DOI:1103/PhysRevB.86.035132
A.R. Schmidt, M.H. Hamidian, P. Wahl, F. Meier, A.V. Balatsky, T.J. Williams, G.M. Luke, J.C. Davis. (2010) Emergence of the Hidden Order State from the Fano Lattice Electronic Structure of the Heavy-Fermion Material URu2Si2. Nature 465 570. DOI:10.1308/nature09073
T.J. Williams, M.N. Wilson, A.A. Aczel, M.B. Stone and G.M. Luke. (2017) Hidden Order Signatures in the Antiferromagnetic Phase of U(Ru1-xFex)2Si2. Physical Review B. 95, 104440. DOI:10.1103/PhysRevB.95.104440
D.R. Gardner, C.J. Bonnoit, R. Chisnell, A.H. Said, B.M. Leu, T.J. Williams, G.M. Luke and Y.S. Lee. (2016) Inelastic x-ray scattering measurements of phonon dynamics in URu2Si2. Phys. Rev. B. 93 075123. DOI:10.1103/PhysRevB.86.235104
M.N. Wilson, T.J. Williams, Y.-P. Cai, A.M. Hallas, T. Medina, T.J. Munsie, S.C. Cheung, B.A. Frandsen, L. Liu, Y.J. Uemura and G.M. Luke. (2016) Antiferromagnetism and Hidden Order in Isoelectronic Doping of URu2Si2. Phys. Rev B. 93 064402. DOI:10.1103/PhysRevB.93.064402
S. Chatterjee, J. Trinckauf, T. Hanke, D.E. Shai, J.W. Harter, T.J. Williams, G.M. Luke, K.M. Shen and J. Geck. (2013) Formation of the coherent heavy fermion liquid at the ‘hidden order’ transition in URu2Si2. Physical Review Letters. 110 186401. DOI:10.1103/PhysRevLett.110.186401
U. Nagel, T. Uleksin, T. Room, R.P.S.M. Lobo, P. Lejay, C.C. Homes, J. Hall, A.W. Kinross, S. Purdy, T.J. Williams, G.M. Luke and T. Timusk. (2011) The Normal State of URu2Si2: Spectroscopic Evidence for an Anomalous Fermi Liquid. Proceedings of the National Academy of Sciences of the United States of America (2012) 109 19161. DOI:10.1073/pnas.1208249109
T.J. Williams, N.P. Butch, G.M. Luke, M.B. Maple, Z. Yamani and W.J.L. Buyers. (2012) Neutron Scattering Study of URu2-xRexSi2 with x=0.10: Driving Order Towards Quantum Criticality. Physical Review B 86 235104. DOI:10.1103/PhysRevB.86.235104
W.T. Guo, Z.G. Chen, T.J. Williams, J.D. Garrett, G.M. Luke and N.L. Wang. (2012) Hybridization Gap versus Hidden Order Gap in URu2Si2 as Revealed by Optical Spectroscopy. Physical Review B 85 195105. DOI:10.1103/PhysRevB.85.195105
J.S. Hall, T.J. Williams, G.M. Luke, U. Nagel, T. Uleskin, T. Room and T. Timusk. (2012) Observation of Multiple-Gap Structure in Hidden Order State of URu2Si2 from Optical Conductivity. Physical Review B 86 035132. DOI:1103/PhysRevB.86.035132
A.R. Schmidt, M.H. Hamidian, P. Wahl, F. Meier, A.V. Balatsky, T.J. Williams, G.M. Luke, J.C. Davis. (2010) Emergence of the Hidden Order State from the Fano Lattice Electronic Structure of the Heavy-Fermion Material URu2Si2. Nature 465 570. DOI:10.1308/nature09073
 
f-electron
 Magnetism
Magnetic f-electron systems are a rich source of unconventional ground states due to the interplay of various interactions, often mediated by the conduction electrons. This results in effective masses of the conduction electron-specific heat being 10-100 times that of a conventional metal. Thus, while metallic, these systems display vastly different properties from ordinary metals.
These strongly correlated systems that exhibit rich phase diagrams and a range of quantum phase transitions. As these materials often have very small magnetic moments, they are very sensitive to perturbations, including applied pressure, applied fields, and the introduction of impurities. This can be seen in the well-studied Ce-115 family of materials, where fairly modest pressures induce a quantum phase transition, and where magnetic-field induced ordering produces a different ordering wavevector than at ambient conditions.
My research on f-electron systems focuses on the effect of various crystal structures in Ce-based compounds. The Ce-115 family hosts CeIn3 layers interlaced with In2 layers, in a quasi-2D arrangement. Newly synthesized compounds of the form Ce-218, Ce-127, etc, are able to tune the structure with respect to this dimensionality. Neutron scattering plays a key role in understanding the magentic interactions in these systems.
Selected Publications:
These strongly correlated systems that exhibit rich phase diagrams and a range of quantum phase transitions. As these materials often have very small magnetic moments, they are very sensitive to perturbations, including applied pressure, applied fields, and the introduction of impurities. This can be seen in the well-studied Ce-115 family of materials, where fairly modest pressures induce a quantum phase transition, and where magnetic-field induced ordering produces a different ordering wavevector than at ambient conditions.
My research on f-electron systems focuses on the effect of various crystal structures in Ce-based compounds. The Ce-115 family hosts CeIn3 layers interlaced with In2 layers, in a quasi-2D arrangement. Newly synthesized compounds of the form Ce-218, Ce-127, etc, are able to tune the structure with respect to this dimensionality. Neutron scattering plays a key role in understanding the magentic interactions in these systems.
Selected Publications:
M.H. Hamidian, A.R. Schmidt, I. Firmo, P. Bradley, J.D. Garrett, T.J. Williams, G.M. Luke, Y. Dubi, A.V. Balatsky and J.C. Davis. (2011) How Kondo-Holes Create Intense Nanoscale Heavy Fermion Hybridization Disorder. Proceedings of the National Academy of Sciences of the United States of America 108 18233.
DOI:10.1073/pnas.1115027108
E. Steven, A. Kiswandhi, D. Krstovka, J. Brooks, M. Almeida, A.P. Goncalves, M.S. Henriques, G. Luke and T.J. Williams. (2011) Robust Properties of the Superconducting Ferromagnet UCoGe. Applied Physics Letters 98 132507. DOI:10.1063/1.3572034
E. Steven, A. Kiswandhi, D. Krstovka, J. Brooks, M. Almeida, A.P. Goncalves, M.S. Henriques, G. Luke and T.J. Williams. (2011) Robust Properties of the Superconducting Ferromagnet UCoGe. Applied Physics Letters 98 132507. DOI:10.1063/1.3572034
Quasi-2D 
Ferromagnets 
Graphene has attracted much attention for potential device applications, as 2D materials hold much promise as candidate spintronic devices. This requires semiconductors that possess ferromagnetic properties,
particularly those that can be manipulated into one- or
two-dimensional forms, so much work has also focused on dilute magnetic semiconductors, which offer a large range of
magnetic properties. However, both classes of materials have
limitiations. In an effort to overcome these limitations, there has been an
emergence of research into the much less common spintronic
candidate: intrinsically ferromagnetic semiconductors.
One of the most interesting possibilities involves the creation of robust, single-layer magnetic semiconductors. Intriguingly and counterintuitively, the Curie temperature of the ferromagnetic semiconductors CrTX3 is predicted to increase in single layers compared to the bulk, and to increase even further when the layers are strained. This motivates a better understanding of the bulk properties as well.
My research has involved measurements of CrSiTe3, and more recently, CrGeTe3 using neutron scattering. Understanding the bulk magnetism and quasi-2D nature of these materials has helped guide theoretical predictions of the monolayer behavior and potential device properties. I am also interested in the broader range of quasi-2D semiconducting ferromagnets and their potential for future devices.
Selected Publications:
One of the most interesting possibilities involves the creation of robust, single-layer magnetic semiconductors. Intriguingly and counterintuitively, the Curie temperature of the ferromagnetic semiconductors CrTX3 is predicted to increase in single layers compared to the bulk, and to increase even further when the layers are strained. This motivates a better understanding of the bulk properties as well.
My research has involved measurements of CrSiTe3, and more recently, CrGeTe3 using neutron scattering. Understanding the bulk magnetism and quasi-2D nature of these materials has helped guide theoretical predictions of the monolayer behavior and potential device properties. I am also interested in the broader range of quasi-2D semiconducting ferromagnets and their potential for future devices.
Selected Publications:
S.-H. Do, J.A. Paddison, G. Sala, T.J. Williams, K. Kaneko, K. Kuwahara, A.F. May, J. Yan, M.A. McGuire, M.B. Stone, M.D. Lumsden and A.D. Christianson. (2022) Gaps in Topological Magnon Spectra: Intrinsic vs. Extrinsic Effects. Phys. Rev. B. 106, L060408.
DOI: 10.1103/PhysRevB.106.L060408
S. Calder, A.V. Haglund, Y. Liu, D.M. Pajerowski, H.B. Cao, T.J. Williams, V.O. Garlea and D. Mandrus. (2020) Magnetic structure and exchange interactions in the layered semiconductor CrPS4. Physical Review B 102 024408.
DOI:10.1103/PhysRevB.102.024408
T.J. Williams, A.A. Aczel, M.D. Lumsden, S.E. Nagler, M.B. Stone, J.-Q. Yan and D. Mandrus. (2015) Magnetic Correlations in the Quasi-2D Semiconducting Ferromagnet CrSiTe3. Physical Review B 92 144404.
DOI:10.1103/PhysRevB.92.144404
L.D. Casto, A.J. Clune, M.O. Yokosuk, J.L. Musfeldt, T.J. Williams, H.L. Zhuang, M.-W. Lin, K. Xiao, R.G. Hennig, B.C. Sales, J-Q. Yan and D. Mandrus. (2015) Strong Spin-Lattice Coupling in CrSiTe3. APL Mat. 3 041515.
DOI:10.1063/1.4914134
Other Publications: S.-H. Do, H. Zhang, D.A. Dahlbom, T.J. Williams, V.O. Garlea, T. Hong, T.-H. Jang, S.-W. Cheong, J.-H. Park, K. Barros, C.D. Batista and A.D. Christianson. (2023) Understanding temperature-dependent SU(3) spin dynamics in the S=1 antiferromagnetic Ba2FeSi2O7. npj Quantum Mater. 8, 5. DOI: 10.1038/s41535-022-00526-7 Q. Ma, E.M. Smith, Z.W. Cronkwright M. Dragomir, G. Mitchell, B.W. Winn, T.J. Williams and B.D. Gaulin. (2022) Magnetic Field Tuning of Parallel Spin Stripe Order and Fluctuations near the Pseudogap Quantum Critical Point in La1.6-xNd0.4Sr0.24CuO4. Phys. Rev. B. 106, 214427. DOI: 10.1103/PhysRevB.106.214427 X. Bai, F. Lechermann, Y. Liu, Y. Cheng, A.I. Kolesnikov, F. Ye, T.J. Williams, S. Chi, G.E. Granroth, A.F. May and S. Calder. (2022) Antiferromagnetic fluctuations and orbital-selective Mott transition in the van der Waals ferromagnet Fe3-xGeTe2. Phys. Rev. B. 106, L180409. DOI: 10.1103/PhysRevB.106.L180409 A.A. Aczel, Q. Chen, J.P. Clancy, C. dela Cruz, D. Reif-i-Plessis, G.J. MacDougall, C.J. Pollock, M.H. Upton, T.J. Williams, N. LaManna, J. Beare, G.M. Luke and H.D. Zhou. (2022) Spin-orbit coupling controlled ground states in the double perovskite iridates A2BIrO6 (A=Ba, Sr; B=Lu,Sc). Phys. Rev. Mat. 6, 094409. DOI: 10.1103/PhysRevMaterials.6.094409 S. Hameed, J. Joe, L.R. Thoutam, J.G. Barriocanal, B. Yu, G. Yu, S. Chi, T. Hong, T.J. Williams, J.W. Freeland, P. Gehring, Z. Xu, M. Matsuda, B. Jalan and M. Greven. (2022) Growth and Characterization of large (Y,La)TiO3 and (Y,Ca)TiO3 single crystals. Physical Review Materials. 5, 125003. DOI: 10.1103/PhysRevMaterials.5.125003 S.-H. Do, H. Zhang, T.J. Williams, T. Hong, V.O. Garlea, T.-H. Jang, S.-W. Cheong, J.-H. Park, C.D. Batista and A.D. Christianson. (2021) Decay and Renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet. Nature Communications 12, 5331. DOI: 10.1038/s41467-021-25591-7 S. Hameed, S. El-Khatib, K.P. Olson, B. Yu, T.J. Williams, T. Hong, Q. Sheng, K. Yamakawa, J. Zang, Y.J. Uemura, G. Zhao, C. Jin, L. Fu, Y. Gu, F. Ning, Y. Cai, K. M. Kojima, J.W. Freeland, M. Matsuda, C. Leighton, and M. Greven. (2021) Nature of the ferromagnetic-antiferromagnetic transition in Y1-xLaxTiO3. Physical Review B. 104, 024410. DOI: 10.1103/PhysRevB.104.024410 Y. Shen, C.N. Saunders, C.M. Bernal, D.L. Abernathy, T.J. Williams, M.E. Manley and B. Fultz. (2021) Prediction and Observation of Intermodulation Sidebands from Anharmonic Phonons. Physical Review B. 103, 134302. DOI: 10.1103/PhysRevB.103.134302 D. Reig-i-Plessis, T.A. Johnson, K. Lu, Q. Chen, J.P.C. Ruff, M.H. Upton, T.J. Williams, S. Calder, H.D. Zhou, J.P. Clancy, A.A. Aczel and G.J. MacDougall. (2020) Structural, electronic, and magnetic properties of nearly-ideal Jeff = 1/2 iridium halides. Physical Review Materials. 4, 124407. DOI: 10.1103/PhysRevMaterials.4.124407 G. Pokharel, H. Suriya Arachige, T.J. Williams, A.F. May, R.S. Fishman, G. Sala, S. Calder, G. Ehlers, D.S. Parker, T. Hong, A. Wildes, D. Mandrus, J.A.M. Paddison and A.D. Christianson. (2020) Cluster Frustration in the Breathing Pyrochlore Magnet LiGaCr4S8. Phys. Rev. Lett. 125, 167201. DOI: 10.1103/PhysRevLett.125.167201 S. Calder, A. Haglund, Y. Liu, D.M. Pajerowski, H.B. Cao, T.J. Williams, V.O. Garlea and D. Mandrus. (2020) Magnetic structure and exchange interactions in the layered semiconductor CrPS4. Phys. Rev. B. 102, 024408. DOI: 10.1103/PhysRevB.102.024408 Y. Liu, A. Rakhman, C.D. Long, Y. Liu and T.J. Williams. (2020) Laser-Assisted High-Energy Proton Pulse Extraction for Feasibility Study of Co-located Muon Source at the SNS. Nuclear Inst. And Methods A. 962, 163706. DOI:10.1016/j.nima.2020.163706 H. Zhang, S. Liu, C. Nelson, L.N. Bezmaternykh, Y.-S. Chen, S.Y. Wang, R. Lobo, K. Page, M. Matsuda, D. Pajerowski, T.J. Williams and T.A. Tyson. (2019) Structural Features Enabling Multiferroic Behavior in the RX3(BO3)4 System. Journal of Physics: Condensed Matter. 31, 505704. DOI:10.1088/1361-648X/ab415f A.A. Aczel, J.P. Clancy, Q. Chen, H.D. Zhou, D. Reig-i-Plessis, G.J. MacDougall, J.P.C. Ruff, M.H. Upton, Z. Islam, T.J. Williams, S. Calder and J.-Q. Yan. (2019) Revisiting the Kitaev material candidacy of Ir4+ double perovskite iridates. Phys. Rev. B. 99, 134417. DOI:10.1103/PhysRevB.99.134417 A.A. Aczel, L.S. DeBeer-Schmitt, T.J. Williams, M.A. McGuire, N. Ghimire, L. Li and D. Mandrus. (2018) Extended exchange interactions stabilize long-period magnetic structures in Cr1/3NbS2. Appl. Phys. Lett. 113, 032404. DOI:10.1063/1.5038021 A.V. Zakrzewski, S. Gangopadhyay, G.J. MacDougall, A.A. Aczel, S.H. Calder and T.J. Williams. (2018) Evolution of Magnetic and Orbital Properties in the Magnetically-Diluted A-Site Spinel Cu1-xZnxRh2O4. Phys. Rev. B. 97, 214411. DOI:10.1103/PhysRevB.97.214411 T.J.S. Munsie, M.N. Wilson, A. Millington, C.M. Thompson, R. Flacau, C. Ding, S. Guo, Z. Gong, A.A. Aczel, H.B. Cao, T.J. Williams, H.A. Dabkowska, F. Ning, J.E. Greedan, and G.M. Luke. (2017) Neutron Diffraction and μSR Studies of Two Polymorphs of Nickel Niobate (NiNb2O6). Phys. Rev. B 96, 144417. DOI:10.1103/PhysRevB.96.144417 D. Ziat, A.A. Aczel, R. Sinclair, Q. Chen, H.D. Zhou, T.J. Williams, M.B. Stone, A. Verrier and J.A. Quilliam. (2017) Frustrated spin-1/2 molecular magnetism in the mixed-valence antiferromagnets Ba3MRu2O9 (M= In, Y, Lu). Phys. Rev. B. 95, 184424. DOI:10.1103/PhysRevB.95.184424 T.J. Williams, A.E. Taylor, A.D. Christianson, S.E. Hahn, R.S. Fishman, D.S. Parker, M.A. McGuire, B.C. Sales and M.D. Lumsden. (2016) Extended Magnetic Exchange Interactions in the High-Temperature Ferromagnet MnBi. Applied Physics Letters. 108 192403. DOI:10.1063/1.4948933 A.A. Aczel, A.M. Cook, T.J. Williams, S. Calder, A.D. Christianson, G.-X. Cao, D. Mandrus, Y.B. Kim and A. Paramekanti. (2016) Highly-anisotropic exchange interactions of jeff = 1/2 iridium moments on the fcc lattice in La2BIrO6 (B=Mg, Zn). Phys. Rev. B. 93 214426. DOI:10.1103/PhysRevB.93.214426 A.E. Taylor, T. Berlijn, S.E. Hahn, A.F. May, T.J. Williams, L. Poudel, S. Calder, R.S. Fishman, M.B. Stone, A.A. Aczel, H. Cao, M.D. Lumsden and A.D. Christianson. (2015) Influence of Interstitial Mn on Magnetism in Room-Temperature Ferromagnet Mn1+δSb. Phys. Rev. B. 91 224418. DOI:10.1103/PhysRevB.91.224418 Y. Tsujimoto, A. Kitada, M. Nishi, Y. Narumi, K. Kindo, T. Goko, Y.J. Uemura, A.A. Aczel, T.J. Williams, G.M. Luke, Y. Ajiro and H. Kageyama. (2014) Spin-singlet Ground State of Two-Dimensional Quantum Spin Antiferromagnet (CuCl)CaNb3O10. Journal of the Physical Society of Japan. 83 074712. DOI:10.7566/JPSJ.83.074712 J. Munevar, H. Micklitz, M. Alzamora, C. Arguello, T. Goko, F.L. Ning, A.A. Aczel, T.J. Williams, G.F. Chen, W. Yu, G.M. Luke, Y.J. Uemura, E. Baggio-Saitovich. (2014) Magnetism in Superconducting EuFe2As1.4P0.6 Single Crystals Studied by Local Probes. Solid State Communications. 187 18. DOI:10.1016/j.ssc.2014.02.001 Cui Ding, Huiyuan Man, Chuan Qin, Jicai Lu, Yunlei Sun, Quan Wang, Biqiong Yu, Chunmu Feng, T. Goko, C. Arguello, L. Liu, B.J. Frandsen, Y.J. Uemura, Hangdong Wang, H. Luetkens, E. Morenzoni, W. Han, C.Q. Jin, T. Munsie, T.J. Williams, R.M. D’Ortenzio, T. Medina, G.M. Luke, T. Imai and F.L. Ning. (2013) (La1-xBax)(Zn1-xMnx)AsO: A Two-Dimensional “1111” Diluted Magnetic Semiconductor in Bulk Form. Physical Review B. 88 041102. DOI:10.1103/PhysRevB.88.041102 J.P. Carlo, T. Goko, I.M. Gat-Malureanu, P.L. Russo, A.T. Savici, A.A. Aczel, G.J. MacDougall, J.A. Rodriguez, T.J. Williams, G.M. Luke, C.R. Wiebe, Y. Yoshida, S. Nakatsuji, Y. Maeno, T. Taniguchi and Y.J. Uemura. (2012) New Magnetic Phase Diagram of (Sr,Ca)2RuO4. Nature Materials 11 323-328. DOI:10.1038/nmat3236 S.R. Dunsinger, A.A. Aczel, C. Arguello, H. Dabkowska, A. Dabkowski, M.-H. Du, T. Goko, B. Javanparast, T. Lin, F. Ning, H.M. Noad, D.J. Singh, T.J. Williams, Y.J. Uemura, M.J. Gingras and G.M. Luke. (2011) Spin Ice: Magnetic Excitations without Monopole Signatures using μSR. Physical Review Letters 107 207207 DOI:10.1103/PhysRevLett.107.207207 Z. Deng, C.Q. Jin, Q.Q. Liu, X.C. Wang, J.L. Zhu, S.M. Feng, L.C. Chen, R.C. Yu, C. Arguello, T. Goko, F. Ning, J. Zhang, Y. Wang, A.A. Aczel, T. Munsie, T.J. Williams, G.M. Luke, T. Kakeshita, S. Uchida, W. Higemoto, T.U. Ito, B. Gu, S. Maekawa, G.D. Morris and Y.J. Uemura. (2011) Li(Zn,Mn)As: A New Generation Ferromagnet Based on the I-II-V Semiconductor. Nature Communications 2 422. DOI:10.1038/ncomms1425 J. Munevar, D.R. Sanchez, M. Alzamora, E. Baggio-Saitovich, J.P. Carlo, T. Goko, A.A. Aczel, T.J. Williams, G.M. Luke, H.-H. Wen, X. Zhu, F. Han and Y.J. Uemura. (2011) Static Magnetic Order of Sr4A2O6Fe2As2 (A = Sc and V) Revealed by Local Probes. Physical Review B 84 024527. DOI:10.1103/PhysRevB.84.024527 T.J. Williams, A.A. Aczel, S.L. Bud’ko, P.C. Canfield, J.P. Carlo, T. Goko, N.Ni, S.R. Saha, J. Paglione, Y.J. Uemura and G.M. Luke. (2010) Superfluid Density and Field-Induced Magnetism in Ba(Fe1-xCox)2As2 and Sr(Fe1-xCox)2As2 Measured with Muon Spin Relaxation. Physical Review B 82 094512. DOI:10.1103/PhysRevB.82.094512 Y. Tsujimoto, A. Kitada, J.P. Carlo, Y.J. Uemura, T. Goko, A.A. Aczel, T.J. Williams, G.M. Luke, Y. Narumi, K. Kindo, M. Nishi, Y. Ajiro, K. Yoshimura and H. Kageyama. (2010) Two-Dimensional S = 1 Quantum Antiferromagnet (NiCl)Sr2Ta3O10. Chemistry of Materials 2010 4625. DOI:10.1021/sm100660v A.A. Aczel, T.J. Williams, T. Goko, J.P. Carlo, W. Yu, Y.J. Uemura, T. Klimczuk, R.J. Cava and G.M. Luke. (2010) Muon spin rotation/relaxation measurements of the non-centrosymmetric superconductor Mg10Ir19B16. Physical Review B 82 024520. DOI:10.1103/PhysRevB.82.024520 B.S. Conner, H.D. Zhou, Y.J. Yo, L. Balicas, C.R. Wiebe, J.P. Carlo, Y.J. Uemura, A.A. Aczel, T.J. Williams and G.M. Luke. (2010) Possible Evidence for a Bose Einstein Condensate of magnons in single crystalline Pb2V3O9. Physical Review B 81 132401. DOI:10.1103/PhysRevB.81.132401 T.J. Williams, A.A. Aczel, E. Baggio-Saitovich, S.L. Bud’ko, P.C. Canfield, J.P. Carlo, T. Goko, J. Munevar, N. Ni, Y.J. Uemura, W. Yu, G.M. Luke. (2009) Muon Spin Rotation Measurement of the Magnetic Field Penetration Depth in Ba(Fe0.93Co0.07)2As2: Evidence for Multiple Superconducting Gaps. Physical Review B 80 094501 DOI:10.1103/PhysRevB.80.094501 Y.J. Uemura, A.A. Aczel, Y. Ajiro, J.P. Carlo, T. Goko, D.A. Goldfeld, A. Kitada, G.M. Luke, G.J. MacDougall, I.G. Mihailescu, J.A. Rodriguez, P.L. Russo, Y. Tsujimoto, C.R. Wiebe, T.J. Williams, K. Yoshimura, H. Kageyama. (2009) Muon spin relaxation studies of the frustrated quasi-two-dimensional square-lattice system Cu(Cl,Br)La(Nb,Ta)2O7: Evolution from spin-gap to antiferromagnetic state. Physical Review B 80 174408. DOI:10.1103/PhysRevB.80.174408 T. Goko, A.A. Aczel, E. Baggio-Saitovitch, S. L. Bud’ko, P. C. Canfield, J. P. Carlo, G. F. Chen, Pengcheng Dai, A. C. Hamann, W. Z. Hu, H. Kageyama, G. M. Luke, J. L. Luo, B. Nachumi, N. Ni, D. Reznik, D. R. Sanchez-Candela, A. T. Savici, K. J. Sikes, N. L. Wang, C. R. Wiebe, T.J. Williams, T. Yamamoto, W. Yu, Y. J. Uemura. (2009) Superconductivity coexisting with phase-separated static magnetic order in (Ba,K)Fe2As2, (Sr,Na)Fe2As2 and CaFe2As2. Physical Review B 80 024508. DOI:10.1103/PhysRevB.80.024508 W. Yu, A.A. Aczel, T.J. Williams, S.L. Bud’ko, N. Ni, P.C. Canfield, G.M. Luke. (2009) The Absence of Superconductivity in Single Phase BaFe2As2 under Hydrostatic Pressure. Physical Review B 79 020511(R). DOI:10.1103/PhysRevB.79.020511 Y. Tsujimoto, H. Kageyama, Y. Baba, A. Kitada, T. Yamamoto, Y. Narumi, K. Kindo, M. Nishi, J.P. Carlo, A.A. Aczel, T.J. Williams, T. Goko, G.M. Luke, Y.J. Uemura, Y. Ueda, Y. Ajiro, K. Yoshimura. (2008) Synthesis, Structure and Magnetic Properties of Two-Dimensional Quantum Antiferromagnets (CuBr)A2B3O10 (A=Ca, Sr, Ba, Pb; B=Nb, Ta) with a 1/3 Magnetization Plateau. Physical Review B 78 214410. DOI:10.1103/PhysRevB.78.214410 A.A. Aczel, E. Baggio-Saitovitch, S. L. Budko, P.C. Canfield, J. P. Carlo, G. F. Chen, Pengcheng Dai, T. Goko, W. Z. Hu, G. M. Luke, J. L. Luo, N. Ni, D. R. Sanchez-Candela, F. F. Tafti, N. L. Wang, T. J. Williams, W. Yu, Y. J. Uemura. (2008). Muon spin relaxation studies of magnetic order and superfluid density in antiferromagnetic NdOFeAs, BaFe2As2 and superconducting (Ba,K)Fe2As2. Physical Review B 78 214503. DOI:10.1103/PhysRevB.78.214503
Other Publications: S.-H. Do, H. Zhang, D.A. Dahlbom, T.J. Williams, V.O. Garlea, T. Hong, T.-H. Jang, S.-W. Cheong, J.-H. Park, K. Barros, C.D. Batista and A.D. Christianson. (2023) Understanding temperature-dependent SU(3) spin dynamics in the S=1 antiferromagnetic Ba2FeSi2O7. npj Quantum Mater. 8, 5. DOI: 10.1038/s41535-022-00526-7 Q. Ma, E.M. Smith, Z.W. Cronkwright M. Dragomir, G. Mitchell, B.W. Winn, T.J. Williams and B.D. Gaulin. (2022) Magnetic Field Tuning of Parallel Spin Stripe Order and Fluctuations near the Pseudogap Quantum Critical Point in La1.6-xNd0.4Sr0.24CuO4. Phys. Rev. B. 106, 214427. DOI: 10.1103/PhysRevB.106.214427 X. Bai, F. Lechermann, Y. Liu, Y. Cheng, A.I. Kolesnikov, F. Ye, T.J. Williams, S. Chi, G.E. Granroth, A.F. May and S. Calder. (2022) Antiferromagnetic fluctuations and orbital-selective Mott transition in the van der Waals ferromagnet Fe3-xGeTe2. Phys. Rev. B. 106, L180409. DOI: 10.1103/PhysRevB.106.L180409 A.A. Aczel, Q. Chen, J.P. Clancy, C. dela Cruz, D. Reif-i-Plessis, G.J. MacDougall, C.J. Pollock, M.H. Upton, T.J. Williams, N. LaManna, J. Beare, G.M. Luke and H.D. Zhou. (2022) Spin-orbit coupling controlled ground states in the double perovskite iridates A2BIrO6 (A=Ba, Sr; B=Lu,Sc). Phys. Rev. Mat. 6, 094409. DOI: 10.1103/PhysRevMaterials.6.094409 S. Hameed, J. Joe, L.R. Thoutam, J.G. Barriocanal, B. Yu, G. Yu, S. Chi, T. Hong, T.J. Williams, J.W. Freeland, P. Gehring, Z. Xu, M. Matsuda, B. Jalan and M. Greven. (2022) Growth and Characterization of large (Y,La)TiO3 and (Y,Ca)TiO3 single crystals. Physical Review Materials. 5, 125003. DOI: 10.1103/PhysRevMaterials.5.125003 S.-H. Do, H. Zhang, T.J. Williams, T. Hong, V.O. Garlea, T.-H. Jang, S.-W. Cheong, J.-H. Park, C.D. Batista and A.D. Christianson. (2021) Decay and Renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet. Nature Communications 12, 5331. DOI: 10.1038/s41467-021-25591-7 S. Hameed, S. El-Khatib, K.P. Olson, B. Yu, T.J. Williams, T. Hong, Q. Sheng, K. Yamakawa, J. Zang, Y.J. Uemura, G. Zhao, C. Jin, L. Fu, Y. Gu, F. Ning, Y. Cai, K. M. Kojima, J.W. Freeland, M. Matsuda, C. Leighton, and M. Greven. (2021) Nature of the ferromagnetic-antiferromagnetic transition in Y1-xLaxTiO3. Physical Review B. 104, 024410. DOI: 10.1103/PhysRevB.104.024410 Y. Shen, C.N. Saunders, C.M. Bernal, D.L. Abernathy, T.J. Williams, M.E. Manley and B. Fultz. (2021) Prediction and Observation of Intermodulation Sidebands from Anharmonic Phonons. Physical Review B. 103, 134302. DOI: 10.1103/PhysRevB.103.134302 D. Reig-i-Plessis, T.A. Johnson, K. Lu, Q. Chen, J.P.C. Ruff, M.H. Upton, T.J. Williams, S. Calder, H.D. Zhou, J.P. Clancy, A.A. Aczel and G.J. MacDougall. (2020) Structural, electronic, and magnetic properties of nearly-ideal Jeff = 1/2 iridium halides. Physical Review Materials. 4, 124407. DOI: 10.1103/PhysRevMaterials.4.124407 G. Pokharel, H. Suriya Arachige, T.J. Williams, A.F. May, R.S. Fishman, G. Sala, S. Calder, G. Ehlers, D.S. Parker, T. Hong, A. Wildes, D. Mandrus, J.A.M. Paddison and A.D. Christianson. (2020) Cluster Frustration in the Breathing Pyrochlore Magnet LiGaCr4S8. Phys. Rev. Lett. 125, 167201. DOI: 10.1103/PhysRevLett.125.167201 S. Calder, A. Haglund, Y. Liu, D.M. Pajerowski, H.B. Cao, T.J. Williams, V.O. Garlea and D. Mandrus. (2020) Magnetic structure and exchange interactions in the layered semiconductor CrPS4. Phys. Rev. B. 102, 024408. DOI: 10.1103/PhysRevB.102.024408 Y. Liu, A. Rakhman, C.D. Long, Y. Liu and T.J. Williams. (2020) Laser-Assisted High-Energy Proton Pulse Extraction for Feasibility Study of Co-located Muon Source at the SNS. Nuclear Inst. And Methods A. 962, 163706. DOI:10.1016/j.nima.2020.163706 H. Zhang, S. Liu, C. Nelson, L.N. Bezmaternykh, Y.-S. Chen, S.Y. Wang, R. Lobo, K. Page, M. Matsuda, D. Pajerowski, T.J. Williams and T.A. Tyson. (2019) Structural Features Enabling Multiferroic Behavior in the RX3(BO3)4 System. Journal of Physics: Condensed Matter. 31, 505704. DOI:10.1088/1361-648X/ab415f A.A. Aczel, J.P. Clancy, Q. Chen, H.D. Zhou, D. Reig-i-Plessis, G.J. MacDougall, J.P.C. Ruff, M.H. Upton, Z. Islam, T.J. Williams, S. Calder and J.-Q. Yan. (2019) Revisiting the Kitaev material candidacy of Ir4+ double perovskite iridates. Phys. Rev. B. 99, 134417. DOI:10.1103/PhysRevB.99.134417 A.A. Aczel, L.S. DeBeer-Schmitt, T.J. Williams, M.A. McGuire, N. Ghimire, L. Li and D. Mandrus. (2018) Extended exchange interactions stabilize long-period magnetic structures in Cr1/3NbS2. Appl. Phys. Lett. 113, 032404. DOI:10.1063/1.5038021 A.V. Zakrzewski, S. Gangopadhyay, G.J. MacDougall, A.A. Aczel, S.H. Calder and T.J. Williams. (2018) Evolution of Magnetic and Orbital Properties in the Magnetically-Diluted A-Site Spinel Cu1-xZnxRh2O4. Phys. Rev. B. 97, 214411. DOI:10.1103/PhysRevB.97.214411 T.J.S. Munsie, M.N. Wilson, A. Millington, C.M. Thompson, R. Flacau, C. Ding, S. Guo, Z. Gong, A.A. Aczel, H.B. Cao, T.J. Williams, H.A. Dabkowska, F. Ning, J.E. Greedan, and G.M. Luke. (2017) Neutron Diffraction and μSR Studies of Two Polymorphs of Nickel Niobate (NiNb2O6). Phys. Rev. B 96, 144417. DOI:10.1103/PhysRevB.96.144417 D. Ziat, A.A. Aczel, R. Sinclair, Q. Chen, H.D. Zhou, T.J. Williams, M.B. Stone, A. Verrier and J.A. Quilliam. (2017) Frustrated spin-1/2 molecular magnetism in the mixed-valence antiferromagnets Ba3MRu2O9 (M= In, Y, Lu). Phys. Rev. B. 95, 184424. DOI:10.1103/PhysRevB.95.184424 T.J. Williams, A.E. Taylor, A.D. Christianson, S.E. Hahn, R.S. Fishman, D.S. Parker, M.A. McGuire, B.C. Sales and M.D. Lumsden. (2016) Extended Magnetic Exchange Interactions in the High-Temperature Ferromagnet MnBi. Applied Physics Letters. 108 192403. DOI:10.1063/1.4948933 A.A. Aczel, A.M. Cook, T.J. Williams, S. Calder, A.D. Christianson, G.-X. Cao, D. Mandrus, Y.B. Kim and A. Paramekanti. (2016) Highly-anisotropic exchange interactions of jeff = 1/2 iridium moments on the fcc lattice in La2BIrO6 (B=Mg, Zn). Phys. Rev. B. 93 214426. DOI:10.1103/PhysRevB.93.214426 A.E. Taylor, T. Berlijn, S.E. Hahn, A.F. May, T.J. Williams, L. Poudel, S. Calder, R.S. Fishman, M.B. Stone, A.A. Aczel, H. Cao, M.D. Lumsden and A.D. Christianson. (2015) Influence of Interstitial Mn on Magnetism in Room-Temperature Ferromagnet Mn1+δSb. Phys. Rev. B. 91 224418. DOI:10.1103/PhysRevB.91.224418 Y. Tsujimoto, A. Kitada, M. Nishi, Y. Narumi, K. Kindo, T. Goko, Y.J. Uemura, A.A. Aczel, T.J. Williams, G.M. Luke, Y. Ajiro and H. Kageyama. (2014) Spin-singlet Ground State of Two-Dimensional Quantum Spin Antiferromagnet (CuCl)CaNb3O10. Journal of the Physical Society of Japan. 83 074712. DOI:10.7566/JPSJ.83.074712 J. Munevar, H. Micklitz, M. Alzamora, C. Arguello, T. Goko, F.L. Ning, A.A. Aczel, T.J. Williams, G.F. Chen, W. Yu, G.M. Luke, Y.J. Uemura, E. Baggio-Saitovich. (2014) Magnetism in Superconducting EuFe2As1.4P0.6 Single Crystals Studied by Local Probes. Solid State Communications. 187 18. DOI:10.1016/j.ssc.2014.02.001 Cui Ding, Huiyuan Man, Chuan Qin, Jicai Lu, Yunlei Sun, Quan Wang, Biqiong Yu, Chunmu Feng, T. Goko, C. Arguello, L. Liu, B.J. Frandsen, Y.J. Uemura, Hangdong Wang, H. Luetkens, E. Morenzoni, W. Han, C.Q. Jin, T. Munsie, T.J. Williams, R.M. D’Ortenzio, T. Medina, G.M. Luke, T. Imai and F.L. Ning. (2013) (La1-xBax)(Zn1-xMnx)AsO: A Two-Dimensional “1111” Diluted Magnetic Semiconductor in Bulk Form. Physical Review B. 88 041102. DOI:10.1103/PhysRevB.88.041102 J.P. Carlo, T. Goko, I.M. Gat-Malureanu, P.L. Russo, A.T. Savici, A.A. Aczel, G.J. MacDougall, J.A. Rodriguez, T.J. Williams, G.M. Luke, C.R. Wiebe, Y. Yoshida, S. Nakatsuji, Y. Maeno, T. Taniguchi and Y.J. Uemura. (2012) New Magnetic Phase Diagram of (Sr,Ca)2RuO4. Nature Materials 11 323-328. DOI:10.1038/nmat3236 S.R. Dunsinger, A.A. Aczel, C. Arguello, H. Dabkowska, A. Dabkowski, M.-H. Du, T. Goko, B. Javanparast, T. Lin, F. Ning, H.M. Noad, D.J. Singh, T.J. Williams, Y.J. Uemura, M.J. Gingras and G.M. Luke. (2011) Spin Ice: Magnetic Excitations without Monopole Signatures using μSR. Physical Review Letters 107 207207 DOI:10.1103/PhysRevLett.107.207207 Z. Deng, C.Q. Jin, Q.Q. Liu, X.C. Wang, J.L. Zhu, S.M. Feng, L.C. Chen, R.C. Yu, C. Arguello, T. Goko, F. Ning, J. Zhang, Y. Wang, A.A. Aczel, T. Munsie, T.J. Williams, G.M. Luke, T. Kakeshita, S. Uchida, W. Higemoto, T.U. Ito, B. Gu, S. Maekawa, G.D. Morris and Y.J. Uemura. (2011) Li(Zn,Mn)As: A New Generation Ferromagnet Based on the I-II-V Semiconductor. Nature Communications 2 422. DOI:10.1038/ncomms1425 J. Munevar, D.R. Sanchez, M. Alzamora, E. Baggio-Saitovich, J.P. Carlo, T. Goko, A.A. Aczel, T.J. Williams, G.M. Luke, H.-H. Wen, X. Zhu, F. Han and Y.J. Uemura. (2011) Static Magnetic Order of Sr4A2O6Fe2As2 (A = Sc and V) Revealed by Local Probes. Physical Review B 84 024527. DOI:10.1103/PhysRevB.84.024527 T.J. Williams, A.A. Aczel, S.L. Bud’ko, P.C. Canfield, J.P. Carlo, T. Goko, N.Ni, S.R. Saha, J. Paglione, Y.J. Uemura and G.M. Luke. (2010) Superfluid Density and Field-Induced Magnetism in Ba(Fe1-xCox)2As2 and Sr(Fe1-xCox)2As2 Measured with Muon Spin Relaxation. Physical Review B 82 094512. DOI:10.1103/PhysRevB.82.094512 Y. Tsujimoto, A. Kitada, J.P. Carlo, Y.J. Uemura, T. Goko, A.A. Aczel, T.J. Williams, G.M. Luke, Y. Narumi, K. Kindo, M. Nishi, Y. Ajiro, K. Yoshimura and H. Kageyama. (2010) Two-Dimensional S = 1 Quantum Antiferromagnet (NiCl)Sr2Ta3O10. Chemistry of Materials 2010 4625. DOI:10.1021/sm100660v A.A. Aczel, T.J. Williams, T. Goko, J.P. Carlo, W. Yu, Y.J. Uemura, T. Klimczuk, R.J. Cava and G.M. Luke. (2010) Muon spin rotation/relaxation measurements of the non-centrosymmetric superconductor Mg10Ir19B16. Physical Review B 82 024520. DOI:10.1103/PhysRevB.82.024520 B.S. Conner, H.D. Zhou, Y.J. Yo, L. Balicas, C.R. Wiebe, J.P. Carlo, Y.J. Uemura, A.A. Aczel, T.J. Williams and G.M. Luke. (2010) Possible Evidence for a Bose Einstein Condensate of magnons in single crystalline Pb2V3O9. Physical Review B 81 132401. DOI:10.1103/PhysRevB.81.132401 T.J. Williams, A.A. Aczel, E. Baggio-Saitovich, S.L. Bud’ko, P.C. Canfield, J.P. Carlo, T. Goko, J. Munevar, N. Ni, Y.J. Uemura, W. Yu, G.M. Luke. (2009) Muon Spin Rotation Measurement of the Magnetic Field Penetration Depth in Ba(Fe0.93Co0.07)2As2: Evidence for Multiple Superconducting Gaps. Physical Review B 80 094501 DOI:10.1103/PhysRevB.80.094501 Y.J. Uemura, A.A. Aczel, Y. Ajiro, J.P. Carlo, T. Goko, D.A. Goldfeld, A. Kitada, G.M. Luke, G.J. MacDougall, I.G. Mihailescu, J.A. Rodriguez, P.L. Russo, Y. Tsujimoto, C.R. Wiebe, T.J. Williams, K. Yoshimura, H. Kageyama. (2009) Muon spin relaxation studies of the frustrated quasi-two-dimensional square-lattice system Cu(Cl,Br)La(Nb,Ta)2O7: Evolution from spin-gap to antiferromagnetic state. Physical Review B 80 174408. DOI:10.1103/PhysRevB.80.174408 T. Goko, A.A. Aczel, E. Baggio-Saitovitch, S. L. Bud’ko, P. C. Canfield, J. P. Carlo, G. F. Chen, Pengcheng Dai, A. C. Hamann, W. Z. Hu, H. Kageyama, G. M. Luke, J. L. Luo, B. Nachumi, N. Ni, D. Reznik, D. R. Sanchez-Candela, A. T. Savici, K. J. Sikes, N. L. Wang, C. R. Wiebe, T.J. Williams, T. Yamamoto, W. Yu, Y. J. Uemura. (2009) Superconductivity coexisting with phase-separated static magnetic order in (Ba,K)Fe2As2, (Sr,Na)Fe2As2 and CaFe2As2. Physical Review B 80 024508. DOI:10.1103/PhysRevB.80.024508 W. Yu, A.A. Aczel, T.J. Williams, S.L. Bud’ko, N. Ni, P.C. Canfield, G.M. Luke. (2009) The Absence of Superconductivity in Single Phase BaFe2As2 under Hydrostatic Pressure. Physical Review B 79 020511(R). DOI:10.1103/PhysRevB.79.020511 Y. Tsujimoto, H. Kageyama, Y. Baba, A. Kitada, T. Yamamoto, Y. Narumi, K. Kindo, M. Nishi, J.P. Carlo, A.A. Aczel, T.J. Williams, T. Goko, G.M. Luke, Y.J. Uemura, Y. Ueda, Y. Ajiro, K. Yoshimura. (2008) Synthesis, Structure and Magnetic Properties of Two-Dimensional Quantum Antiferromagnets (CuBr)A2B3O10 (A=Ca, Sr, Ba, Pb; B=Nb, Ta) with a 1/3 Magnetization Plateau. Physical Review B 78 214410. DOI:10.1103/PhysRevB.78.214410 A.A. Aczel, E. Baggio-Saitovitch, S. L. Budko, P.C. Canfield, J. P. Carlo, G. F. Chen, Pengcheng Dai, T. Goko, W. Z. Hu, G. M. Luke, J. L. Luo, N. Ni, D. R. Sanchez-Candela, F. F. Tafti, N. L. Wang, T. J. Williams, W. Yu, Y. J. Uemura. (2008). Muon spin relaxation studies of magnetic order and superfluid density in antiferromagnetic NdOFeAs, BaFe2As2 and superconducting (Ba,K)Fe2As2. Physical Review B 78 214503. DOI:10.1103/PhysRevB.78.214503
Other Publications:
S.-H. Do, H. Zhang, T.J. Williams, T. Hong, V.O. Garlea, T.-H. Jang, S.-W. Cheong, J.-H. Park, C.D. Batista and A.D. Christianson. (2021) Decay and Renormalization of a longitudinal mode in a quasi-two-dimensional antiferromagnet. Nature Communications 12, 5331.
DOI: 10.1038/s41467-021-25591-7
S. Hameed, S. El-Khatib, K.P. Olson, B. Yu, T.J. Williams, T. Hong, Q. Sheng, K. Yamakawa, J. Zang, Y.J. Uemura, G. Zhao, C. Jin, L. Fu, Y. Gu, F. Ning, Y. Cai, K. M. Kojima, J.W. Freeland, M. Matsuda, C. Leighton, and M. Greven. (2021) Nature of the ferromagnetic-antiferromagnetic transition in Y1-xLaxTiO3. Physical Review B. 104, 024410.
DOI: 10.1103/PhysRevB.104.024410
Y. Shen, C.N. Saunders, C.M. Bernal, D.L. Abernathy, T.J. Williams, M.E. Manley and B. Fultz. (2021) Prediction and Observation of Intermodulation Sidebands from Anharmonic Phonons. Physical Review B. 103, 134302.
DOI: 10.1103/PhysRevB.103.134302
D. Reig-i-Plessis, T.A. Johnson, K. Lu, Q. Chen, J.P.C. Ruff, M.H. Upton, T.J. Williams, S. Calder, H.D. Zhou, J.P. Clancy, A.A. Aczel and G.J. MacDougall. (2020) Structural, electronic, and magnetic properties of nearly-ideal Jeff = 1/2 iridium halides. Physical Review Materials. 4, 124407.
DOI: 10.1103/PhysRevMaterials.4.124407
G. Pokharel, H. Suriya Arachige, T.J. Williams, A.F. May, R.S. Fishman, G. Sala, S. Calder, G. Ehlers, D.S. Parker, T. Hong, A. Wildes, D. Mandrus, J.A.M. Paddison and A.D. Christianson. (2020) Cluster Frustration in the Breathing Pyrochlore Magnet LiGaCr4S8. Phys. Rev. Lett. 125, 167201.
DOI: 10.1103/PhysRevLett.125.167201
S. Calder, A. Haglund, Y. Liu, D.M. Pajerowski, H.B. Cao, T.J. Williams, V.O. Garlea and D. Mandrus. (2020) Magnetic structure and exchange interactions in the layered semiconductor CrPS4. Phys. Rev. B. 102, 024408.
DOI: 10.1103/PhysRevB.102.024408
Y. Liu, A. Rakhman, C.D. Long, Y. Liu and T.J. Williams. (2020) Laser-Assisted High-Energy Proton Pulse Extraction for Feasibility Study of Co-located Muon Source at the SNS. Nuclear Inst. And Methods A. 962, 163706.
DOI:10.1016/j.nima.2020.163706
H. Zhang, S. Liu, C. Nelson, L.N. Bezmaternykh, Y.-S. Chen, S.Y. Wang, R. Lobo, K. Page, M. Matsuda, D. Pajerowski, T.J. Williams and T.A. Tyson. (2019) Structural Features Enabling Multiferroic Behavior in the RX3(BO3)4 System. Journal of Physics: Condensed Matter. 31, 505704.
DOI:10.1088/1361-648X/ab415f
A.A. Aczel, J.P. Clancy, Q. Chen, H.D. Zhou, D. Reig-i-Plessis, G.J. MacDougall, J.P.C. Ruff, M.H. Upton, Z. Islam, T.J. Williams, S. Calder and J.-Q. Yan. (2019) Revisiting the Kitaev material candidacy of Ir4+ double perovskite iridates. Phys. Rev. B. 99, 134417.
DOI:10.1103/PhysRevB.99.134417
A.A. Aczel, L.S. DeBeer-Schmitt, T.J. Williams, M.A. McGuire, N. Ghimire, L. Li and D. Mandrus. (2018) Extended exchange interactions stabilize long-period magnetic structures in Cr1/3NbS2. Appl. Phys. Lett. 113, 032404.
DOI:10.1063/1.5038021
A.V. Zakrzewski, S. Gangopadhyay, G.J. MacDougall, A.A. Aczel, S.H. Calder and T.J. Williams. (2018) Evolution of Magnetic and Orbital Properties in the Magnetically-Diluted A-Site Spinel Cu1-xZnxRh2O4. Phys. Rev. B. 97, 214411.
DOI:10.1103/PhysRevB.97.214411
T.J.S. Munsie, M.N. Wilson, A. Millington, C.M. Thompson, R. Flacau, C. Ding, S. Guo, Z. Gong, A.A. Aczel, H.B. Cao, T.J. Williams, H.A. Dabkowska, F. Ning, J.E. Greedan, and G.M. Luke. (2017) Neutron Diffraction and μSR Studies of Two Polymorphs of Nickel Niobate (NiNb2O6). Phys. Rev. B 96, 144417.
DOI:10.1103/PhysRevB.96.144417
D. Ziat, A.A. Aczel, R. Sinclair, Q. Chen, H.D. Zhou, T.J. Williams, M.B. Stone, A. Verrier and J.A. Quilliam. (2017) Frustrated spin-1/2 molecular magnetism in the mixed-valence antiferromagnets Ba3MRu2O9 (M= In, Y, Lu). Phys. Rev. B. 95, 184424.
DOI:10.1103/PhysRevB.95.184424
T.J. Williams, A.E. Taylor, A.D. Christianson, S.E. Hahn, R.S. Fishman, D.S. Parker, M.A. McGuire, B.C. Sales and M.D. Lumsden. (2016) Extended Magnetic Exchange Interactions in the High-Temperature Ferromagnet MnBi. Applied Physics Letters. 108 192403.
DOI:10.1063/1.4948933
A.A. Aczel, A.M. Cook, T.J. Williams, S. Calder, A.D. Christianson, G.-X. Cao, D. Mandrus, Y.B. Kim and A. Paramekanti. (2016) Highly-anisotropic exchange interactions of jeff = 1/2 iridium moments on the fcc lattice in La2BIrO6 (B=Mg, Zn). Phys. Rev. B. 93 214426.
DOI:10.1103/PhysRevB.93.214426
A.E. Taylor, T. Berlijn, S.E. Hahn, A.F. May, T.J. Williams, L. Poudel, S. Calder, R.S. Fishman, M.B. Stone, A.A. Aczel, H. Cao, M.D. Lumsden and A.D. Christianson. (2015) Influence of Interstitial Mn on Magnetism in Room-Temperature Ferromagnet Mn1+δSb. Phys. Rev. B. 91 224418.
DOI:10.1103/PhysRevB.91.224418
Y. Tsujimoto, A. Kitada, M. Nishi, Y. Narumi, K. Kindo, T. Goko, Y.J. Uemura, A.A. Aczel, T.J. Williams, G.M. Luke, Y. Ajiro and H. Kageyama. (2014) Spin-singlet Ground State of Two-Dimensional Quantum Spin Antiferromagnet (CuCl)CaNb3O10. Journal of the Physical Society of Japan. 83 074712.
DOI:10.7566/JPSJ.83.074712
J. Munevar, H. Micklitz, M. Alzamora, C. Arguello, T. Goko, F.L. Ning, A.A. Aczel, T.J. Williams, G.F. Chen, W. Yu, G.M. Luke, Y.J. Uemura, E. Baggio-Saitovich. (2014) Magnetism in Superconducting EuFe2As1.4P0.6 Single Crystals Studied by Local Probes. Solid State Communications. 187 18.
DOI:10.1016/j.ssc.2014.02.001
Cui Ding, Huiyuan Man, Chuan Qin, Jicai Lu, Yunlei Sun, Quan Wang, Biqiong Yu, Chunmu Feng, T. Goko, C. Arguello, L. Liu, B.J. Frandsen, Y.J. Uemura, Hangdong Wang, H. Luetkens, E. Morenzoni, W. Han, C.Q. Jin, T. Munsie, T.J. Williams, R.M. D’Ortenzio, T. Medina, G.M. Luke, T. Imai and F.L. Ning. (2013) (La1-xBax)(Zn1-xMnx)AsO: A Two-Dimensional “1111” Diluted Magnetic Semiconductor in Bulk Form. Physical Review B. 88 041102.
DOI:10.1103/PhysRevB.88.041102
J.P. Carlo, T. Goko, I.M. Gat-Malureanu, P.L. Russo, A.T. Savici, A.A. Aczel, G.J. MacDougall, J.A. Rodriguez, T.J. Williams, G.M. Luke, C.R. Wiebe, Y. Yoshida, S. Nakatsuji, Y. Maeno, T. Taniguchi and Y.J. Uemura. (2012) New Magnetic Phase Diagram of (Sr,Ca)2RuO4. Nature Materials 11 323-328.
DOI:10.1038/nmat3236
S.R. Dunsinger, A.A. Aczel, C. Arguello, H. Dabkowska, A. Dabkowski, M.-H. Du, T. Goko, B. Javanparast, T. Lin, F. Ning, H.M. Noad, D.J. Singh, T.J. Williams, Y.J. Uemura, M.J. Gingras and G.M. Luke. (2011) Spin Ice: Magnetic Excitations without Monopole Signatures using μSR. Physical Review Letters 107 207207
DOI:10.1103/PhysRevLett.107.207207
Z. Deng, C.Q. Jin, Q.Q. Liu, X.C. Wang, J.L. Zhu, S.M. Feng, L.C. Chen, R.C. Yu, C. Arguello, T. Goko, F. Ning, J. Zhang, Y. Wang, A.A. Aczel, T. Munsie, T.J. Williams, G.M. Luke, T. Kakeshita, S. Uchida, W. Higemoto, T.U. Ito, B. Gu, S. Maekawa, G.D. Morris and Y.J. Uemura. (2011) Li(Zn,Mn)As: A New Generation Ferromagnet Based on the I-II-V Semiconductor. Nature Communications 2 422.
DOI:10.1038/ncomms1425
J. Munevar, D.R. Sanchez, M. Alzamora, E. Baggio-Saitovich, J.P. Carlo, T. Goko, A.A. Aczel, T.J. Williams, G.M. Luke, H.-H. Wen, X. Zhu, F. Han and Y.J. Uemura. (2011) Static Magnetic Order of Sr4A2O6Fe2As2 (A = Sc and V) Revealed by Local Probes. Physical Review B 84 024527.
DOI:10.1103/PhysRevB.84.024527
T.J. Williams, A.A. Aczel, S.L. Bud’ko, P.C. Canfield, J.P. Carlo, T. Goko, N.Ni, S.R. Saha, J. Paglione, Y.J. Uemura and G.M. Luke. (2010) Superfluid Density and Field-Induced Magnetism in Ba(Fe1-xCox)2As2 and Sr(Fe1-xCox)2As2 Measured with Muon Spin Relaxation. Physical Review B 82 094512.
DOI:10.1103/PhysRevB.82.094512
Y. Tsujimoto, A. Kitada, J.P. Carlo, Y.J. Uemura, T. Goko, A.A. Aczel, T.J. Williams, G.M. Luke, Y. Narumi, K. Kindo, M. Nishi, Y. Ajiro, K. Yoshimura and H. Kageyama. (2010) Two-Dimensional S = 1 Quantum Antiferromagnet (NiCl)Sr2Ta3O10. Chemistry of Materials 2010 4625.
DOI:10.1021/sm100660v
A.A. Aczel, T.J. Williams, T. Goko, J.P. Carlo, W. Yu, Y.J. Uemura, T. Klimczuk, R.J. Cava and G.M. Luke. (2010) Muon spin rotation/relaxation measurements of the non-centrosymmetric superconductor Mg10Ir19B16. Physical Review B 82 024520.
DOI:10.1103/PhysRevB.82.024520
B.S. Conner, H.D. Zhou, Y.J. Yo, L. Balicas, C.R. Wiebe, J.P. Carlo, Y.J. Uemura, A.A. Aczel, T.J. Williams and G.M. Luke. (2010) Possible Evidence for a Bose Einstein Condensate of magnons in single crystalline Pb2V3O9. Physical Review B 81 132401.
DOI:10.1103/PhysRevB.81.132401
T.J. Williams, A.A. Aczel, E. Baggio-Saitovich, S.L. Bud’ko, P.C. Canfield, J.P. Carlo, T. Goko, J. Munevar, N. Ni, Y.J. Uemura, W. Yu, G.M. Luke. (2009) Muon Spin Rotation Measurement of the Magnetic Field Penetration Depth in Ba(Fe0.93Co0.07)2As2: Evidence for Multiple Superconducting Gaps. Physical Review B 80 094501
DOI:10.1103/PhysRevB.80.094501
Y.J. Uemura, A.A. Aczel, Y. Ajiro, J.P. Carlo, T. Goko, D.A. Goldfeld, A. Kitada, G.M. Luke, G.J. MacDougall, I.G. Mihailescu, J.A. Rodriguez, P.L. Russo, Y. Tsujimoto, C.R. Wiebe, T.J. Williams, K. Yoshimura, H. Kageyama. (2009) Muon spin relaxation studies of the frustrated quasi-two-dimensional square-lattice system Cu(Cl,Br)La(Nb,Ta)2O7: Evolution from spin-gap to antiferromagnetic state. Physical Review B 80 174408.
DOI:10.1103/PhysRevB.80.174408
T. Goko, A.A. Aczel, E. Baggio-Saitovitch, S. L. Bud’ko, P. C. Canfield, J. P. Carlo, G. F. Chen, Pengcheng Dai, A. C. Hamann, W. Z. Hu, H. Kageyama, G. M. Luke, J. L. Luo, B. Nachumi, N. Ni, D. Reznik, D. R. Sanchez-Candela, A. T. Savici, K. J. Sikes, N. L. Wang, C. R. Wiebe, T.J. Williams, T. Yamamoto, W. Yu, Y. J. Uemura. (2009) Superconductivity coexisting with phase-separated static magnetic order in (Ba,K)Fe2As2, (Sr,Na)Fe2As2 and CaFe2As2. Physical Review B 80 024508.
DOI:10.1103/PhysRevB.80.024508
W. Yu, A.A. Aczel, T.J. Williams, S.L. Bud’ko, N. Ni, P.C. Canfield, G.M. Luke. (2009) The Absence of Superconductivity in Single Phase BaFe2As2 under Hydrostatic Pressure. Physical Review B 79 020511(R).
DOI:10.1103/PhysRevB.79.020511
Y. Tsujimoto, H. Kageyama, Y. Baba, A. Kitada, T. Yamamoto, Y. Narumi, K. Kindo, M. Nishi, J.P. Carlo, A.A. Aczel, T.J. Williams, T. Goko, G.M. Luke, Y.J. Uemura, Y. Ueda, Y. Ajiro, K. Yoshimura. (2008) Synthesis, Structure and Magnetic Properties of Two-Dimensional Quantum Antiferromagnets (CuBr)A2B3O10 (A=Ca, Sr, Ba, Pb; B=Nb, Ta) with a 1/3 Magnetization Plateau. Physical Review B 78 214410.
DOI:10.1103/PhysRevB.78.214410
A.A. Aczel, E. Baggio-Saitovitch, S. L. Budko, P.C. Canfield, J. P. Carlo, G. F. Chen, Pengcheng Dai, T. Goko, W. Z. Hu, G. M. Luke, J. L. Luo, N. Ni, D. R. Sanchez-Candela, F. F. Tafti, N. L. Wang, T. J. Williams, W. Yu, Y. J. Uemura. (2008). Muon spin relaxation studies of magnetic order and superfluid density in antiferromagnetic NdOFeAs, BaFe2As2 and superconducting (Ba,K)Fe2As2. Physical Review B 78 214503.
DOI:10.1103/PhysRevB.78.214503