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63. Intrinsic quantum disorder in Yb2Ti2O7 and the quantum S=1/2 pyrochlore phase diagram
Shang-Shun Zhang, Anish Bhardwaj, SM Koohpayeh, DM Pajerowski, Jeffrey G Rau, Hitesh J Changlani, Allen Scheie2025, arXiv:2511.1567862. Quenched disorder in the triangular lattice antiferromagnet YbZn2GaO5
Leshan Zhao, Tong Chen, Matthew B Stone, Qiang Zhang, Colin L Sarkis, SM Koohpayeh, Collin Broholm2025, arxiv:2507.1259261. Defect engineering in epitaxial thin films of the pyrochlore frustrated magnet Tb2Ti2O7
M.A. Anderson, I. El Baggari, C.M. Brooks, T. Powell, C. Lygouras, A. N’Diaye, S.M. Koohpayeh, J. Nordlander, J.A. Mundy2024, Chem. Mater., 36, 5, 2325-233360. Pressure control of magnetic order and excitations in the pyrochlore antiferromagnet MgCr2O4
LS Nassar, H Lane, B Haberl, M Graves-Brook, B Winn, SM Koohpayeh, M Mourigal 2024, PRB, 109, 06441559. Quantum paramagnetism in a non-Kramers rare-earth oxide: Monoclinic Pr2Ti2O7
H. Man, A. Ghasemi, M. Adnani, M.A. Siegler, E. Anber, Y. Li, C.L. Chien, M. Taheri, C.W. Chu, C.L. Broholm, and S.M. Koohpayeh 2023, PRM 7, 06340158. Photoinduced structural dynamics of multiferroic TbMnO3
E. Abreu, M. Savoini, L. Boie, P. Beaud, V. Esposito, M. Kubli, M.J. Neugebauer, M. Porer, U. Staub, S.M. Koohpayeh, B. Burganov, C. Dornes, A. Rodriguez-Fernandez, L. Huber, G. Lantz, J.R.L. Mardegan, S. Parchenko, J. Rittmann, C. Svetina, G. Ingold, and S.L. Johnson 2022, PRB 106, 21431257. Dynamical scaling as a signature of multiple phase competition in Yb2Ti2O7
Allen Scheie, Owen Benton, Mathieu Taillefumier, Ludovic DC Jaubert, Gabriele Sala, Niina Jalarvo, S M Koohpayeh, Nic Shannon2022, PRL 129, 21720256. Quantum critical magnetic excitations in spin-1/2 and spin-1 chain systems
LS Wang, Y Xu, YY Huang, JM Ni, CC Zhao, YF Dai, BY Pan, XC Hong, P Chauhan, SM Koohpayeh, NP Armitage, SY Li2022, PRX 12, 02102055. Monopolar and dipolar relaxation in spin ice Ho2Ti2O7
Yishu Wang, T. Reeder, Y. Karaki, J. Kindervater, T. Halloran, N. Maliszewskyj, Yiming Qiu, J. A. Rodriguez, S. Gladchenko, S. M. Koohpayeh, S. Nakatsuji, C. Broholm2021, Science Advances, Vol 7, No 2554. Topological nature of the Kondo insulator SmB6 and its sensitiveness to Sm vacancy
W. K. Park, J. A. Sittler, L. H. Greene, W. T. Fuhrman, J. R. Chamorro, S. M. Koohpayeh, W. A. Phelan, T. M. McQueen2021, Phys. Rev. B 103, 15512553. Bulk transport paths through defects in floating zone and Al-flux grown SmB6
Y. Suk Eo, A. Rakoski, Sh. Sinha, D. Mihaliov, W. T. Fuhrman, Sh. R Saha, P. FS Rosa, Z. Fisk, M.C. Hatnean, G. Balakrishnan, J.R. Chamorro, S.M. Koohpayeh, T.M. McQueen, B. Kang, M. Song, B. Cho, M.S. Fuhrer, J. Paglione, C. Kurdak2021, Phys. Rev. Materials 5, 05500152. Duality and domain wall dynamics in a twisted Kitaev chain
CM Morris, Nisheeta Desai, J Viirok, D Huvonen, U Nagel, T Room, JW Krizan, RJ Cava, T McQueen, S.M Koohpayeh, Ribhu K Kaul, NP Armitage2021, Nature Physics51. Low energy magneto-optics of Tb2Ti2O7 in a [111] magnetic field
Xinshu Zhang, Yi Luo, T Halloran, J Gaudet, Huiyuan Man, SM Koohpayeh, NP Armitage2021, PRB 103, L14040350. Multiphase magnetism in Yb2Ti2O7
A. Scheie, J. Kindervater, S. Zhang, H.J. Changlani, G. Sala, G. Ehlers, A. Heinemann, G.S. Tucker, S.M. Koohpayeh, C. Broholm2020, PNAS 117 (44) 27245-2725449. Orientation dependence of the magnetic phase diagram of Yb2Ti2O7
S. Säubert, A. Scheie, C. Duvinage, J. Kindervater, S. Zhang, H.J. Changlani, Guangyong Xu, S.M. Koohpayeh, O. Tchernyshyov, C.L. Broholm, C. Pfleiderer2020, PRB 101 (17), 17443448. Tunable magnon interactions in a ferromagnetic Spin-1 chain
P Chauhan, F Mahmood, HJ Changlani, SM Koohpayeh, NP Armitage2020, PRL 124, 03720347. Ultrafast evolution and transient phases of a prototype out-of-equilibrium Mott-Hubbard material
David Moreno-Mencía, Alberto Ramos-Álvarez, Luciana Vidas, Seyed M. Koohpayeh, Simon Wall2019, Nature Communications 10, Article number: 403446. Enhanced thermal Hall conductivity below 1 Kelvin in the pyrochlore magnet Yb2Ti2O7
Max Hirschberger, Peter Czajka, SM Koohpayeh, Wudi Wang, N Phuan Ong2019, arXiv:1903.0059545. Synthesis, crystal growth and characterization of the pyrochlore Er2Ti2O7
Q.Wang, A. Ghasemi, A. Scheie, and S.M. Koohpayeh2019, CrystEngComm, 21, 703-70944. Magnetic excitations of the classical spin liquid MgCr2O4
X. Bai, J.A.M. Paddison, E. Kapit, S.M. Koohpayeh, J.-J. Wen, S.E. Dutton, A.T. Savici, A.I. Kolesnikov, G.E. Granroth, C.L. Broholm, J.T. Chalker, M, Mourigal2019, PRL 122, 09720143. Magnetic dichroism in the Kondo insulator SmB6
W.T. Fuhrman, J.C. Leiner, J.W. Freeland, M. van Veenendaal, S.M. Koohpayeh, W.A. Phelan, T.M. McQueen, C. Broholm2019, PRB 99, 020401(R)42. Super-dislocations and point defects in pyrochlore Yb2Ti2O7 single crystals and implication on magnetic ground states
Zahra Shafieizadeh, Yan Xin, S.M. Koohpayeh, Qing Huang, Haidong Zhou2018, Nature - Scientific Reports 8, Article number: 1720241. The pyrochlore Ho2Ti2O7: Synthesis, crystal growth, and stoichiometry
Alireza Ghasemi, Allen Scheie, Jonas Kindervater, S.M. Koohpayeh2018, J. of Crystal Growth 500, 38-4340. Lattice-mediated magnetic order melting in TbMnO3
E. Baldini, T. Kubacka, B.P.P. Mallett, C. Ma, S.M. Koohpayeh, Y. Zhu, C. Bernhard, S.L. Johnson, F. Carbone2018, PRB 97, 12514939. Universal Geometric Frustration in Pyrochlores
B.A. Trump, S.M. Koohpayeh, K.J.T. Livi, J.-J. Wen, K.E. Arpino, Q.M. Ramasse, R. Brydson, M. Feygenson, H. Takeda, M. Takigawa, K. Kimura, S. Nakatsuji, C.L. Broholm, T.M. McQueen2018, Nature Communications, Vol. 9, 261938. An effect of Sm vacancies on the hybridization gap in topological Kondo insulator candidate SmB6
M.E. Valentine, S.M. Koohpayeh, W.A. Phelan, T.M. McQueen, P.F.S. Rosa, Z. Fisk, N. Drichko2018, Physica B: Condensed Matter, Vol. 536, 60-6337. Non-uniform carrier density in Cd3As2 evidenced by optical spectroscopy
I. Crassee, E. Martino, C.C. Homes, O. Caha, J. Novak, P. Tuckmantel, M. Hakl, A. Nateprov, E. Arushanov, Q.D. Gibson, R.J. Cava, S.M. Koohpayeh, K.E. Arpino, T.M. McQueen, M. Orlita, A. Akrap2018, PRB 97, 12520436. Field-dependent heat transport in the Kondo insulator SmB6: phonons scattered by magnetic impurities
M-E. Boulanger, F. Laliberte, S. Badoux, N. Doiron-Leyraud, W.A. Phelan, S.M. Koohpayeh, T.M. McQueen, X. Wang, Y. Nakajima, T. Metz, J. Paglione, L. Taillefer2018, PRB 97, 24514135. Impurities or a neutral Fermi surface? A further examination of the low-energy ac optical conductivity of SmB6
N.J. Laurita, C.M. Morris, S.M. Koohpayeh, W.A. Phelan, T.M. McQueen, N.P. Armitage2018, Physica B: Condensed Matter, Vol. 536, 78-8434. Dynamic pathway of the photoinduced phase transition of TbMnO3
E. M. Bothschafter, E. Abreu, L. Rettig, T. Kubacka, S. Parchenko, M. Porer, C. Dornes, Y. W. Windsor, M. Ramakrishnan, A. Alberca, S. Manz, J. Saari, S.M. Koohpayeh, M. Fiebig, T. Forrest, P. Werner, S. S. Dhesi, S. L. Johnson, U. Staub2017, PRB 96, 18441433. Reentrant phase diagram of Yb2Ti2O7 in a 111 magnetic field
A. Scheie, J. Kindervater, S. Säubert, C. Duvinage, C. Pfleiderer, H. J. Changlani, S. Zhang, L. Harriger, K. Arpino, S.M. Koohpayeh, O. Tchernyshyov, C. Broholm2017, PRL 119, 12720132. Disordered route to the coulomb quantum spin liquid: Random transverse fields on spin ice in Pr2Zr2O7
J.-J. Wen, S.M. Koohpayeh, K.A. Ross, B.A. Trump, T.M. McQueen, K. Kimura, S. Nakatsuji, Y. Qiu, D.M. Pajerowski, J.R.D. Copley, C.L. Broholm2017, PRL 118, 10720631. Impact of stoichiometry of the pyrochlore quantum spin-Ice Yb2Ti2O7 on physical properties
K.E. Arpino, B.A. Trump, T.M. McQueen, S.M. Koohpayeh2017, PRB 95, 09440730. Anomalous 3D bulk AC conduction within the Kondo gap of SmB6 single crystals
N.J. Laurita, C.M. Morris, S.M. Koohpayeh, P.S. Rosa, W.A. Phelan, Z. Fisk, T.M. McQueen, N.P. Armitage2016, PRB 94, 16515429. Growth and characterization of Iron Scandium Sulfide (FeSc2S4)
J.R. Morey, K.W. Plumb, C.M. Pasco, T.M. McQueen, S.M. Koohpayeh2016, J. of Crystal Growth, Vol. 454, 128-13328. Single crystal growth by the traveling solvent technique: A review
S.M. Koohpayeh2016, J. of Progress in Crystal Growth and Characterization of Materials, Vol. 62, 22-3427. Magneto-optical signature of massless Kane electrons in Cd3As2
A. Akrap, M. Hakl, S. Tchoumakov, I. Crassee, J. Kuba, M.O. Goerbig, C.C. Homes, O. Caha, J. Novak, F. Teppe, S.M. Koohpayeh, L. Wu, N.P. Armitage, A. Nateprov, E. Arushanov, Q.D. Gibson, R.J. Cava, D. van der Marel, C. Faugeras, G. Martinez, M. Potemski, M. Orlita 2016, PRL 117, 13640126. Breakdown of the Kondo insulating state in SmB6 by introducing Sm vacancies
M.E. Valentine, S.M. Koohpayeh, W.A. Phelan, T.M. McQueen, P.F.S. Rosa, Z. Fisk, N. Drichko2016, PRB 94, 07510225. On the chemistry and physical properties of flux and floating zone grown SmB6 single crystals
W. Phelan, S.M. Koohpayeh, P. Cottingham, J. Leiner, M. Lumsden, Ch. Hoffmann, M. Siegler, T. McQueen2016, Nature - Scientific Reports 6, 2086024. Magnetic order dynamics in optically excited multiferroic TbMnO3
J.A. Johnson, T. Kubacka, M.C. Hoffmann, C. Vicario, S. de Jong, P. Beaud, S. Grübel, S.-W. Huang, L. Huber, Y.W. Windsor, E.M. Bothschafter, L. Rettig, M. Ramakrishnan, A. Alberca, L. Patthey, Y.-D. Chuang, J.J. Turner, G.L. Dakovski, W.-S. Lee, M.P. Minitti, W. Schlotter, R.G. Moore, C.P. Hauri, S.M. Koohpayeh, V. Scagnoli, G. Ingold, S.L. Johnson, U. Staub2015, PRB 92, 18442923. Heat capacity peak at the quantum critical point of the Transverse Ising Magnet CoNb2O6
T. Liang, S.M. Koohpayeh, J.W. Krizan, T.M. McQueen, R.J. Cava, N.P. Ong2015, Nature Communication 6, 761122. Interaction driven sub-gap spin-exciton in the Kondo insulator SmB6
W.T. Fuhrman, J. Leiner, P. Nikolić, G.E. Granroth, M.B. Stone, M.D. Lumsden, L. DeBeer-Schmitt, P.A. Alekseev, J.-M. Mignot, S.M. Koohpayeh, P. Cottingham, W.A. Phelan, L. Schoop, T.M. McQueen, C. Broholm2015, PRL 114, 03640121. Disorder from Order Among ANNNI Spin Chains in SrHo2O4
J.-J. Wen, W. Tian, V.O. Garlea, S.M. Koohpayeh, T.M. McQueen, H.-F. Li, J.-Q. Yan, D. Vaknin, C.L. Broholm2015, PRB 91, 05442420. Raman study of magnetic excitations and magneto-elastic coupling in alpha-SrCr2O4
M. Valentine, S.M. Koohpayeh, M. Mourigal, T.M. McQueen, C. Broholm, N. Drichko, S. Dutton, R.J. Cava, T. Birol, H. Das, C.J. Fennie2015, PRB 91, 14441119. Synthesis, floating zone crystal growth and characterization of the Quantum Spin Ice Pr2Zr2O7 pyrochlore
S.M. Koohpayeh, J.-J. Wen, B. Trump, C.L. Broholm, T.M. McQueen2014, J. of Crystal Growth, Vol. 402, 291-29818. Low Energy Electrodynamics of Novel Spin Excitations in the Quantum Spin Ice Yb2Ti2O7
LiDong Pan, Se Kwon Kim, A. Ghosh, Christopher M. Morris, Kate A. Ross, Edwin Kermarrec, Bruce D. Gaulin, S. M. Koohpayeh, Oleg Tchernyshyov, N. P. Armitage2014, Nature Communication 5, 497017. Correlation between bulk thermodynamic measurements and the low temperature resistance plateau in SmB6
W.A. Phelan, S.M. Koohpayeh, P. Cottingham, J.W. Freeland, J.C. Leiner, C.L. Broholm, T.M. McQueen2014, PRX 4, 03101216. Hierarchy of Bound States in the 1D Ferromagnetic Ising Chain CoNb2O6 Investigated by High-Resolution Time-Domain Terahertz Spectroscopy
C.M. Morris, R. Valdés Aguilar, A. Ghosh, S.M. Koohpayeh, J. Krizan, R.J. Cava, O. Tchernyshyov, T.M. McQueen, N.P. Armitage2014, PRL 112, 13740315. Large-Amplitude Spin Dynamics Driven by a THz Pulse in Resonance with an Electromagnon
T. Kubacka, J.A. Johnson, M.C. Hoffmann, C. Vicario, S. de Jong, P. Beaud, S. Grübel, S-W. Huang, L. Huber, L. Patthey, Y-D. Chuang, J.J. Turner, G.L. Dakovski, W-S. Lee, W. Schlotter, R. G. Moore, C.P. Hauri, S.M. Koohpayeh, V. Scagnoli, G. Ingold, S.L. Johnson, U. Staub2014, Science, Vol. 343, Issue 6177, 1333-133614. Evidence for Topologically Protected Surface States and a Superconducting Phase in [Tl4](Tl1-xSnx)Te3 Using Photoemission, Specific Heat, and Magnetization Measurements, and Density Functional Theory
K.E. Arpino, D.C. Wallace, Y. F. Nie, T. Birol, P.D.C. King, S. Chatterjee, M. Uchida, S.M. Koohpayeh, J.-J. Wen, C. J. Fennie, K. M. Shen, T. M. McQueen2014, PRL 112, 01700213. Melting of chiral order in terbium manganate (TbMnO3) observed with resonant x-ray Bragg diffraction
S.W. Lovesey, V. Scagnoli, M. Garganourakis, S.M. Koohpayeh, C. Detlefs, U. Staub2013, J. of Physics: Condensed Matter, Vol. 25, 36220212. Optical floating zone crystal growth and magnetic properties of MgCr2O4
S.M. Koohpayeh, J.-J. Wen, M. Mourigal, S.E. Dutton, R.J. Cava, C.L. Broholm, T.M. McQueen2013, J. of Crystal Growth, Vol. 384, 39-4311. Ferromagnetic-type order of atomic multipoles in the polar ferrimagnetic GaFeO3
U. Staub, C. Piamonteze, M. Garganouraksi, S. P. Collins, S.M. Koohpayeh, D. Fort, S. W. Lovesey2012, PRB 85, 14442110. Cr-doped TiO2 (rutile): Ferromagnetism in bulk form?
S.M. Koohpayeh, A.J. Williams, J.S. Abell, J. Lim, E. Blackburn2010. J. of Applied Physics 108, 0739199. Magnetoelectric effects studied by resonant x-ray diffraction in ferrimagnetic GaFeO3
U. Staub, Y. Bodenthin, C. Piamonteze, S. P. Collins, S.M. Koohpayeh, D. Fort, S. W. Lovesey2010, PRB 82, 1044118. Parity- and time-odd atomic multipoles in magnetoelectric GaFeO3 as seen via soft x-ray diffraction
U. Staub, Y. Bodenthin, C. Piamonteze, M. Garcia- Fernandez, V. Scagnoli, M. Garganourakis, S.M. Koohpayeh, D. Fort, S. W. Lovesey2009, PRB 80, 1404107. Thermal characterization of an optical floating zone furnace: a direct link with controllable growth parameters
S.M. Koohpayeh, D. Fort, A. Bradshaw, J.S. Abell2009, J. of Crystal Growth, Vol. 311, 2513-25186. Effect of oxygen content on dielectric properties of float-zone grown TiO2 crystals
K.K. Bamzai, S.M. Koohpayeh, B. Kaur, D. Fort, J.S. Abell2008, J. of Ferroelectrics, Vol. 377, 1-215. The optical floating zone technique: a review of experimental procedures with special reference to oxides
S.M. Koohpayeh, D. Fort, J.S. Abell2008, J. of Progress in Crystal Growth and Characterization of Materials, Vol. 54, 121-1374. Study of ferromagnetism in Co-doped rutile powders and float-zone grown single crystals
S.M. Koohpayeh, D. Fort, A. Bevan, A. Williams, J.S. Abell2008, J. of Magnetism and Magnetic Materials, Vol. 320, 887-8943. The influence of growth rate on the microstructural and magnetic properties of FZ grown ErFeO3 crystals
S.M. Koohpayeh, D. Fort, J.S. Abell, A. Williams, A. Bevan, K.K. Bamzai2007, J. of Magnetism and Magnetic Materials, Vol. 309, 119-1252. Effect of strain-hardening exponent on the occurrence of central burst in aluminium wire drawing process
S.M. Koohpayeh, A. Karimi Taheri2006, Wire International Journal, 63-661. Some observations on the growth of rutile crystals using the optical FZ method
S.M. Koohpayeh, D. Fort, J.S. Abell2005, J. of Crystal Growth, Vol. 282, 190-198Google Sites
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