J. Inoue, S. Ishihara, W. Koshibae, Y. Kawamura, S. Okamoto, and S. Maekawa, Spin and orbital orderings and their excitations in perovskite Mn oxides, Czechoslovak Journal of Physics, Vol. 46 (1996), Suppl. S6, p.3225-3231. [External link, PDF]
W. Koshibae, S. Ishihara, Y. Kawamura, S. Okamoto, J. Inoue, and S. Maekawa, Magnetic and orbital excitations in manganese oxides, Physica B 230-232, 1058-1060 (1997). [External link, PDF]
W. Koshibae, Y. Kawamura, S. Ishihara, S. Okamoto, J. Inoue, and S. Maekawa, Spin and orbital orderings in perovskite manganites, Physica B 237-238, 48-50 (1997). [External link, PDF]
J. Inoue, S. Okamoto, S. Ishihara, W. Koshibae, Y. Kawamura, and S. Maekawa, Raman scattering by orbital waves in perovskite LaMnO3, Physica B 237-238, 51-53 (1997). [External link, PDF]
W. Koshibae, Y. Kawamura, S. Ishihara, S. Okamoto, J. Inoue, and S. Maekawa, Interplay of spin and orbital orderings in perovskite manganites, J. Phys. Soc. Jpn. 66, No.4, 957-960 (1997). [External link, PDF]
S. Ishihara, S. Okamoto, and S. Maekawa, Pressure effects in manganites with layered perovskite structure, J. Phys. Soc. Jpn. 66, No.10, 2965-2968 (1997). [External link, PDF]
Y. Endoh, K. Hirota, S. Ishihara, S. Okamoto, Y. Murakami, A. Nishizawa, T. Fukuda, H. Kimura, H. Nojiri, K. Kaneko, and S. Maekawa, Transition between two ferromagnetic states driven by orbital ordering in La0.88Sr0.12MnO3, Phys. Rev. Lett. 82, No.21, 4328-4331 (1999). [External link, PDF]
T. Akimoto, Y. Moritomo, K. Ohoyama, S. Okamoto, S. Ishihara, S. Maekawa, and A. Nakamura, Interrelation between orbital polarization and magnetic structure in bilayer manganites, Phys. Rev. B 59, No.22, R14153-R14156 (1999). [External link, PDF]
S. Okamoto, S. Ishihara, and S. Maekawa, Orbital degree of freedom and phase separation in ferromagnetic manganites at finite temperature, Phys. Rev. B 61, No.1, 451-458 (2000). [External link, PDF]
T. Akimoto, Y. Moritomo, K. Ohoyama, S. Okamoto, S. Ishihara, S. Maekawa, K. Hirota, and A. Nakamura, Orbital stability in the spin-ordered phase of bilayer manganites as investigated by neutron-diffraction measurements, Phys. Rev. B 61, No.17, 11270-11273 (2000). [External link, PDF]
S. Okamoto, S. Ishihara, and S. Maekawa, Phase transition in perovskite manganites with orbital degree of freedom, Phys. Rev. B 61, No.21, 14647-14655 (2000).
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Y. Moritomo, K. Hirota, H. Nakao, T. Kiyama, Y. Murakami, S. Okamoto, S. Ishihara, S. Maekawa, M. Kubota, and H. Yoshizawa, Pressure-induced insulator-metal transition in a bilayer manganite: Pressure control of orbital stability, Phys. Rev. B 62, No.1, 17-20 (2000). [External link, PDF]
A. Machida, Y. Moritomo, K. Ohoyama, S. Okamoto, S. Ishihara, S. Maekawa, and A. Nakamura, Reconsideration of the lattice effect on the charge-ordering transition of doped manganites, Phys. Rev. B 62, No.1, 80-83 (2000). [External link, PDF]
S. Okamoto, S. Ishihara, and S. Maekawa, Orbital structure and magnetic ordering in layered manganites: Universal correlation and its mechanism, Phys. Rev. B 63, No.10, 104401 (2001). [External link, PDF]
E. Saitoh, S. Okamoto, K. Takahashi, K. Tobe, K. Yamamoto, T. Kimura, S. Ishihara, S. Maekawa, and Y. Tokura, Observation of orbital waves as elementary excitations in a solid, Nature 410, 180-183 (2001). [External link]
S. Ishihara, S. Okamoto, and S. Maekawa, Roles of electron correlation and orbital degree of freedom in manganese oxides, Trans. Mat. Res. Soc. Jpn. 26, No.3, 963-966 (2001). [External link, PDF]
T. Hayashi, N. Miura, K. Noda, H. Kuwahara, S. Okamoto, S. Ishihara, and S. Maekawa, Field-induced orbital order-disorder transition in an A-type antiferromagnetic manganite: High-field Study of Nd0.45Sr0.55MnO3, Phys. Rev. B 65, No.2, 024408 (2002). [External link, PDF]
S. Okamoto, S. Ishihara, and S. Maekawa, Orbital ordering in LaMnO3: Electron-electron and electron-lattice interactions, Phys. Rev. B 65, No.14, 144403 (2002). [External link, PDF]
E. Saitoh, S. Okamoto, K. Tobe, K. Yamamoto, T. Kimura, S. Ishihara, S. Maekawa, and Y. Tokura, Experimental quest for orbital waves: Reply, Nature 418, 40 (2002). [External link]
S. Okamoto, S. Ishihara, and S. Maekawa, Theory of Raman scattering from orbital excitations in manganese oxides, Phys. Rev. B 66, No.1, 014435 (2002). [External link, PDF]
G. Khaliullin and S. Okamoto, Quantum behavior of orbitals in ferromagnetic titanates: Novel orderings and excitations, Phys. Rev. Lett. 89, No.16, 167201 (2002). [External link, PDF]
C. Ulrich, G. Khaliullin, S. Okamoto, M. Reehuis, A. Ivanov, H. He, Y. Taguchi, Y. Tokura, and B. Keimer, Magnetic order and dynamics in an orbitally degenerate ferromagnetic insulator, Phys. Rev. Lett. 89, No.16, 167202 (2002). [External link, PDF]
S. Okamoto, A. J. Millis, H. Monien, and A. Fuhrmann, Fictive impurity models: An alternative formulation of the cluster dynamical mean field method, Phys. Rev. B 68, No.19, 195121 (2003). [External link, PDF]
G. Khaliullin and S. Okamoto, Theory of orbital state and spin interactions in ferromagnetic titanates, Phys. Rev. B 68, No.20, 205109 (2003). [External link, PDF]
R. Kajimoto, H. Mochizuki, H. Yoshizawa, S. Okamoto, and S. Ishihara, Ferromagnetic insulating phase in Pr1−xCaxMnO3, Phys. Rev. B 69, No.5, 054433 (2004). [External link, PDF]
S. Okamoto and A. J. Millis, Electronic reconstruction at an interface between a Mott insulator and a band insulator, Nature 428, 630-633 (2004). [External link]
S. Okamoto and A. J. Millis, Theory of Mott insulator-band insulator heterostructure, Phys. Rev. B 70, No.7, 075101 (2004). [External link, PDF]
S. Okamoto and A. J. Millis, Electron-lattice coupling, orbital stability, and the phase diagram of Ca2−xSrxRuO4, Phys. Rev. B 70, No.19, 195120 (2004). [External link, PDF]
S. Okamoto and A. J. Millis, Spatial inhomogeneity and strong correlation physics: A dynamical mean-field study of a model Mott-insulator—band-insulator heterostructure, Phys. Rev. B 70, No.24, 241104(R) (2004). [External link, PDF]
S. Okamoto, A. Fuhrmann, A. Comanac, and A. J. Millis, Benchmarkings for a semiclassical impurity solver for dynamical-mean-field theory: Self-energies and magnetic transitions of the single-orbital Hubbard model, Phys. Rev. B 71, No.23, 235113 (2005). [External link, PDF]
S. Okamoto and A. J. Millis, Interface ordering and phase competition in a model Mott-insulator-band-insulator heterostructure, Phys. Rev. B 72, No.23, 235108 (2005).
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C. Lin, S. Okamoto, and A. J. Millis, Dynamical mean-field study of model double-exchange superlattices, Phys. Rev. B 73, No.23, 041104(R) (2006). [External link, PDF]
S. Okamoto, A. J. Millis, and N. A. Spaldin, Lattice relaxation in oxide heterostructures: LaTiO3/SrTiO3 superlattices, Phys. Rev. Lett. 97, No.5, 056802 (2006). [External link, PDF]
M. Takizawa,M, H. Wadati, K. Tanaka,M. Hashimoto, T. Yoshida, A. Fujimori, A. Chikamatsu, H. Kumigashira, M. Oshima, K. Shibuya, T. Mihara, T. Ohnishi, M. Lippmaa, M. Kawasaki, H. Koinuma, S. Okamoto, and A. J. Millis, Photoemission from buried interfaces in SrTiO3/LaTiO3 superlattices, Phys. Rev. Lett. 97, No.5, 057601 (2006). [External link, PDF]
S. S. Kancharla and S. Okamoto, Band insulator to Mott insulator transition in a bilayer Hubbard model, Phys. Rev. B 75, No. 19, 193103 (2007). [External link, PDF]
A. Fuhrmann, S. Okamoto, H. Monien, and A. J. Millis, Fictive-impurity approach to dynamical mean-field theory: A strong-coupling investigation, Phys. Rev. B 75, No. 20, 205118 (2007). [External link, PDF]
S. Okamoto, Nonequilibrium transport and optical properties of model metal–Mott-insulator–metal heterostructures, Phys. Rev. B 76, No. 3, 035105 (2007). [External link, PDF]
S. Yunoki, A. Moreo, E. Dagotto, S. Okamoto, S. S. Kancharla, A. Fujimori, Electron doping of cuprates via interfaces with manganites, Phys. Rev. B 76, No. 6. 064532 (2007). [External link, PDF]
K. Yamaura, M. Arai, A. Sato, A. B. Karki, D. P. Young, R. Movshovich, S. Okamoto, D. Mandrus, and E. Takayama-Muromachi, NaV2O4: A Quasi-1D metallic antiferromagnet with half-metallic chains, Phys. Rev. Lett. 99, 196601 (2007). [External link, PDF] This paper was selected as an Editors’ Suggestion.
I. González, S. Okamoto, S. Yunoki, A Moreo, and E. Dagotto, Charge transfer in heterostructures of strongly correlated materials, J. Phys.: Condens. Matter 20, 264002 (2008). [External link, PDF]
R. S. Fishman, S. Okamoto, and F. A. Reboredo, Inverse Jahn-Teller transition in bimetallic oxalates, Phys. Rev. Lett. 101, 116402 (2008). [External link, PDF]
S. Okamoto, Nonlinear transport through strongly correlated two-terminal heterostructures: A dynamical mean-field approach, Phys. Rev. Lett. 101, 116807 (2008). [External link, PDF]
S. Okamoto and T. A. Maier, Enhanced superconductivity in superlattices of high-Tc cuprates, Phys. Rev. Lett. 101, 156401 (2008). [External link, PDF]
R. S. Fishman, S. Okamoto, and F. A. Reboredo, Spin-orbit coupling and Jahn-Teller distortion in bimetallic oxalates, Polyhedron 28, 1740 (2009). [External link, PDF]
S. Okamoto, Surface magnetic phase transition of the double-exchange ferromagnet: Schwinger-boson mean-field study, J. Phys.: Condens. Matter 21, 355601 (2009). [External link, PDF]
R. S. Fishman, S. Okamoto, W. W. Shum, and J. S. Miller, Giant antiferromagnetically coupled moments in a molecule-based magnet with interpenetrating lattices, Phys. Rev. B 80, 064401 (2009). [External link, PDF]
R. S. Fishman, S. Okamoto, and J. S. Miller, Molecule-based magnets with diruthenium building blocks in two and three dimensions, Phys. Rev. B 80, 140416(R) (2009).
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Y. G. Shi, Y. F. Guo, S. Yu, M. Arai, A. A. Belik, A. Sato, K. Yamaura, E. Takayama-Muromachi, H. F. Tian, H. X. Yang, J. Q. Li, T. Varga, J. F. Mitchell, and S. Okamoto, Continuous metal-insulator transition of the antiferromagnetic perovskite NaOsO3, Phys. Rev. B 80, 161104(R) (2009). [External link, PDF]
R. S. Fishman and S. Okamoto, Noncollinear magnetic phases of a triangular-lattice antiferromagnet and of doped CuFeO2, Phys. Rev. B 81, 020402(R) (2010). [External link, PDF]
K. Yoshimatsu, T. Okabe, H. Kumigashira, S. Okamoto, S. Aizaki, A. Fujimori, and M. Oshima, Dimensional-crossover-driven metal-insulator transition in SrVO3 ultrathin films, Phys. Rev. Lett. 104, 147601 (2010). [External link, PDF]
S. Okamoto and T. A. Maier, Microscopic inhomogeneity and superconducting properties of a two-dimensional Hubbard model for high-Tc cuprates, Phys. Rev. B 81, 214525 (2010). [External link, PDF]
P. Yu, J.-S. Lee, S. Okamoto, M. D. Rossell, M. Huijben, C.-H. Yang, Q. He, J. X. Zhang, S.Y. Yang, M. J. Lee, Q. M. Ramasse, R. Erni, Y.-H. Chu, D. A. Arena, C.-C. Kao, L.W. Martin, and R. Ramesh, Interface ferromagnetism and orbital reconstruction in BiFeO3-La0.7Sr0.3MnO3 heterostructure, Phys. Rev. Lett. 105, 027201 (2010). [External link, PDF]
S. Okamoto, Magnetic interaction at an interface between manganite and other transition-metal oxides, Phys. Rev. B 82, 024427 (2010). [External link, PDF]
A. Y. Borisevich, H. J. Chang, M. Huijben, M. P. Oxley, S. Okamoto, M. K. Niranjan, J. D. Burton, E.Y. Tsymbal, Y. H. Chu, P. Yu, R. Ramesh, S. V. Kalinin, and S. J. Pennycook, Suppression of octahedral tilts and associated changes in electronic properties at epitaxial oxide heterostructure interfaces, Phys. Rev. Lett. 105, 087204 (2010). [External link, PDF]
J. Garcia-Barriocanal, J. C. Cezar, F. Y. Bruno, P. Thakur, N. B. Brookes, C. Utfeld, A. Rivera-Calzada, S. R. Giblin, J. W. Taylor, J. A. Duffy, S. B. Dugdale, T. Nakamura, K. Kodama, C. Leon, S. Okamoto, and J. Santamaria, Spin and orbital Ti magnetism at LaMnO3/SrTiO3 interfaces, Nat. Commun. 1, 82 (2010). [External link]
S. Okamoto, D. Sénéchal, M. Civelli, and A.-M. Tremblay, Dynamical electronic nematicity from Mott physics, Phys. Rev. B 82, 180511(R) (2010). [External link, PDF] This paper was selected as an Editors’ Suggestion.
J. Salafranca and S. Okamoto, Unconventional proximity effect and inverse spin-switch behavior in a model manganite-cuprate-manganite trilayer system, Phys. Rev. Lett. 105, 256804 (2010). [External link, PDF]
F. Y. Bruno, J. Garcia-Barriocanal, M. Varela, N. M. Nemes, P. Thakur, J. C. Cezar, N. B. Brookes, A. Rivera-Calzada, M. Garcia-Hernandez, C. Leon, S. Okamoto, S. J. Pennycook, J. Santamaria, Electronic and magnetic Reconstructions in La0.7Sr0.3MnO3/SrTiO3 heterostructures: A case of enhanced interlayer coupling controlled by the interface, Phys. Rev. Lett. 106, 147205 (2011). [External link, PDF]
J. Liu, S. Okamoto, M. van Veenendaal, M. Kareev, B. Gray, P. Ryan, J. W. Freeland, and J. Chakhalian, Quantum confinement of Mott electrons in ultrathin LaNiO3/LaAlO3 superlattices, Phys. Rev. B 83, 161102(R) (2011). [External link, PDF] This paper was selected as an Editors’ Suggestion.
C.-W. Lee, R. K. Behera, S. Okamoto, R. Devanathan, E. D. Wachsman, S. R. Phillpot, and S. B. Sinnott, Stabilization mechanisms of LaFeO3 (010) surfaces determined with first principles calculations, J. Am. Ceram. Soc. 94, 1931-1939 (2011). [External link, PDF]
M. Matsuo, S. Okamoto, W. Koshibae, M. Mori, and S. Maekawa, Non-monotonic temperature dependence of thermopower in strongly correlated electron systems, Phys. Rev. B 84, 153107 (2011). [External link, PDF]
K.-Y. Yang, W. Zhu, D. Xiao, S. Okamoto, Z. Wang, and Y. Ran, Possible interaction-driven topological phases in (111) bilayers of LaNiO3, Phys. Rev. B 84, 201104(R) (2011). [External link, PDF]
S. Okamoto, Anomalous mass enhancement in strongly correlated quantum wells, Phys. Rev. B 84, 201305(R) (2011). [External link, PDF]
D. Xiao, W. Zhu, Y. Ran, N. Nagaosa, and S. Okamoto, Interface engineering of quantum Hall effects in digital transition metal oxide heterostructures, Nat. Commun. 2, 596 (2011). [External link, arXiv]
S. Okamoto and N. Furukawa, Spontaneous fourfold-symmetry breaking driven by electron-lattice coupling and strong correlations in high-Tc cuprates, Phys. Rev. B 86, 094522 (2012). [External link, PDF]
S. Okamoto, Doped Mott insulators in (111) bilayers of perovskite transition-metal oxides with the strong spin-orbit coupling, Phys. Rev. Lett. 110, 066403 (2013). [External link, PDF]
E. Assmann, P. Blaha, R. Laskowski, K. Held, S. Okamoto, and G. Sangiovanni, Oxide heterostructures for efficient solar cells, Phys. Rev. Lett. 110, 078701 (2013). [External link, PDF] This paper is spotlighted as a Synopsis in Physics: Physics Synopsis: Building Better Solar Cells, Layer by Layer.
S. Okamoto, Global phase diagram of a doped Kitaev-Heisenberg model, Phys. Rev. B 87, 064508 (2013). [External link, PDF]
E. Sakai, M. Tamamitsu, K. Yoshimatsu, S. Okamoto, K. Horiba, M. Oshima, and H. Kumigashira, Gradual localization of Ni 3d states in LaNiO3 ultrathin films induced by dimensional crossover, Phys. Rev. B 87, 075132 (2013). [External link, PDF]
D. Yi, J. Liu, S. Okamoto, S. Jagannatha, Y.-C. Chen, P. Yu, Y.-H. Chu, E. Arenholz, and R. Ramesh, Tuning the competition between ferromagnetism and antiferromagnetism in a half-doped manganite through magnetoelectric coupling, Phys. Rev. Lett. 111, 127601 (2013). [External link, PDF]
Q. Li, G.-X. Cao, S. Okamoto, J. Yi, W. Lin, B. C. Sales, J. Yan, R. Arita, J. Kuneš, A. V. Kozhevnikov, A. G. Eguiluz, M. Imada, Z. Gai, M. Pan, and D. G. Mandrus, Atomically resolved spectroscopic study of Sr2IrO4: Experiment and theory, Sci. Rep. 3, 3073 (2013). [External link, arXiv]
C. Mitra, R. S. Fishman, S. Okamoto, H.-N. Lee, and F. A. Reboredo, Ground-state and spin-wave dynamics in brownmillerite SrCoO2.5—a combined hybrid functional and LSDA+U study, J. Phys.: Condens. Matter 26, 036004 (2014). [External link, arXiv]
S. Calder, G.-X. Cao, S. Okamoto, J. W. Kim, V. R. Cooper, Z. Gai, B. C. Sales, M. D. Lumsden, D. Mandrus, and A. D. Christianson, Jeff=1/2 Mott spin-orbit insulating state close to the cubic limit in Ca4IrO6, Phys. Rev. B 89, 081104(R) (2014). [External link, PDF] This paper was selected as an Editors’ Suggestion.
S. Okamoto, W. Zhu, Y. Nomura, R. Arita, D. Xiao, and N. Nagaosa, Correlation effects in (111) bilayers of perovskite transition-metal oxides, Phys. Rev. B 89, 195121 (2014). [External link, PDF]
F. A. Cuellar, Y. H. Liu, J. Salafranca, N. Nemes, E. Iborra, G. Sanchez-Santolino, M. Varela, M. Garcia Hernandez, J. W. Freeland, M. Zhernenkov, M. R. Fitzsimmons, S. Okamoto, S. J. Pennycook, M. Bibes, A. Barthélémy, S. G. E. te Velthuis, Z. Sefrioui, C. Leon, and J. Santamaria, Reversible electric-field control of magnetization at oxide interfaces, Nat. Commun. 5, 4215 (2014). [External link]
V. R. Cooper, S. S. A. Seo, S. Lee, J. S. Kim, W. S. Choi, S. Okamoto, H.-N. Lee, Transparent conducting oxides: A δ-doped superlattice approach, Sci. Rep. 4, 6021 (2014). [External link]
D. W. Jeong, W. S. Choi, S. Okamoto, J.-Y. Kim, K. W. Kim, S. J. Moon, D.-Y. Cho, H. N. Lee, and T. W. Noh, Dimensionality control of d-orbital occupation in oxide superlattices, Sci. Rep. 4, 6124 (2014). [External link, arXiv]
J. H. You, J. H. Lee, S. Okamoto, V. Cooper, and H. N. Lee, Strain effects on the electronic properties in δ-doped oxide superlattices, J. Phys. D: Appl. Phys. 48, 085303 (2015). [External link]
N. Sivadas, M. W. Daniels, R. H. Swendsen, S. Okamoto, and D. Xiao, Magnetic ground state of semiconducting transition metal trichalcogenide monolayers, Phys. Rev. B 91, 235425 (2015). [External link, PDF]
H. Dixit, J. H. Lee, J. T. Krogel, S. Okamoto, and V. R. Cooper, Stabilization of weak ferromagnetism by strong magnetic response to epitaxial strain in multiferroic BiFeO3, Sci. Rep. 5, 12969 (2015). [External link]
S. Calder, L. Li, S. Okamoto, Y. Choi, R. Mukherjee, D. Haskel, and D. Mandrus, Spin-orbit driven magnetic insulating state with Jeff=1/2 character in a 4d oxide, Phys. Rev. B 92, 180413(R) (2015). [External link, PDF] This paper was selected as an Editors’ Suggestion.
S. Okamoto, Spin injection and spin transport in paramagnetic insulators, Phys. Rev. B 93, 064421 (2016). [External link, PDF] This paper was selected as an Editors’ Suggestion.
M. Ochi, R. Arita, N. Trivedi, and S. Okamoto, Strain-induced topological transition in SrRu2O6 and CaOs2O6, Phys. Rev. B 93, 195149 (2016). [External link, PDF]
Z. Qiu, J. Li, D. Hou, E. Arenholz, A. T. N’Diaye, A. Tan, K. Uchida, K. Sato, S. Okamoto, Y. Tserkovnyak, Z. Q. Qiu, and E. Saitoh, Spin-current probe for phase transition in an insulator, Nat. Commun. 7, 12670 (2016). [External link, arXiv]
R. Cheng, S. Okamoto, and D. Xiao, Spin Nernst effect of magnons in collinear antiferromagnets, Phys. Rev. Lett. 117, 217202 (2016). [External link, PDF]
N. Sivadas, S. Okamoto, and D. Xiao, Gate-controllable magneto-optic Kerr effect in layered collinear antiferromagnets, Phys. Rev. Lett. 117, 267203 (2016). [External link, PDF]
S. Okamoto, J. Nichols, C. Sohn, S. Y. Kim, T. W. Noh, and H. N. Lee, Charge transfer in iridate-manganite superlattices, Nano Lett. 17, 2126 (2017). [External link, arXiv]
R. S. Fishman and S. Okamoto, Spiral spin state with open boundary conditions in a magnetic field, Phys. Rev. B 96, 014439 (2017). [External link, PDF]
S. Okamoto, M. Ochi, R. Arita, J.-Q. Yan, and N. Trivedi, Localized-itinerant dichotomy and unconventional magnetism in SrRu2O6, Sci. Rep. 7, 11742 (2017). [External link, arXiv]
J. H. Lee, J. Ma, S. E. Hahn, H. B. Cao, M. Lee, T. Hong, H.-J. Lee, M. S. Yeom, S. Okamoto, H. D. Zhou, M. Matsuda, and R. S. Fishman, Magnetic frustration driven by itinerancy in spinel CoV2O4, Sci. Rep. 7, 17129 (2017). [External link, arXiv]
S. Okamoto and D. Xiao, Transition-metal oxide (111) bilayers, J. Phys. Soc. Jpn. 87, 041006 (2018). [External link, arXiv] This paper is published as a contribution to Special Topics: New ab initio Approaches to Exploring Emergent Phenomena in Quantum Matter.
S. Okamoto, G. Alvarez, E. Dagotto, and T. Tohyama, Accuracy of the microcanonical Lanczos method to compute real-frequency dynamical spectral functions of quantum models at finite temperatures, Phys. Rev. E 97, 043308 (2018). [External link, PDF]
S. Tang, R. S. Fishman, S. Okamoto, J. Yi, Q. Zou, M. Fu, A.-P. Li, D. Mandrus, and Z. Gai, Tuning magnetic soliton phase via dimensional confinement in exfoliated 2D Cr1/3NbS2 thin flakes, Nano Lett. 18, 4023 (2018). [External link]
J. Sheng, F. Ye, C. Hoffmann, V. R. Cooper, S. Okamoto, J. Terzic, H. Zheng, H. Zhao, and G. Cao, Anisotropic antiferromagnetic order in the spin-orbit coupled trigonal-lattice Ca2Sr2IrO6, Phys. Rev. B 97, 235116 (2018). [External link, PDF]
Y. Zhang, S. Okamoto, and D. Xiao, Spin-Nernst effect in the paramagnetic regime of an antiferromagnetic insulator, Phys. Rev. B 98, 035424 (2018). [External link, PDF]
E.-J. Guo, M. A. Roldan, X. Sang, S. Okamoto, T. Charlton, H. Ambaye, H. N. Lee, and M. R. Fitzsimmons, Influence of chemical composition and crystallographic orientation on the interfacial magnetism in BiFeO3/La1−xSrxMnO3 superlattices, Phys. Rev. Materials 2, 114404 (2018). [External link, PDF]
N. Sivadas, S. Okamoto, X. Xu, C. J. Fennie, and D. Xiao, Stacking-dependent magnetism in bilayer CrI3, Nano Lett. 18, 7658 (2018). [External link, arXiv]
J.-Q. Yan, S. Okamoto, Y. Wu, Q. Zheng, H. D. Zhou, H. B. Cao, and M. A. McGuire, Magnetic order in single crystals of Na3Co2SbO6 with a honeycomb arrangement of 3d7 Co2+ ions, Phys. Rev. Materials 3, 074405 (2019). [External link, PDF]
C. Eichstaedt, Y. Zhang, P. Laurell, S. Okamoto, A. G. Eguiluz, and T. Berlijn, Deriving models for the Kitaev spin-liquid candidate material α-RuCl3 from first principles, Phys. Rev. B 100, 075110 (2019). [External link, PDF]
N. Mohanta, E. Dagotto, and S. Okamoto, Topological Hall effect and emergent skyrmion crystal at manganite-iridate oxide interfaces, Phys. Rev. B 100, 064429 (2019). [External link, PDF] This paper was selected as an Editors’ Suggestion.
J.-Q. Yan, S. Okamoto, M. A. McGuire, A. F. May, R. J. McQueeney, and B. C. Sales, Evolution of structural, magnetic and transport properties in MnBi2−xSbxTe4, Phys. Rev. B, 100, 104409 (2019). [External link, PDF] This paper was selected as an Editors’ Suggestion.
X. Zhang, Y. Zhang, S. Okamoto, and D. Xiao, Thermal Hall Effect Induced by Magnon-Phonon Interactions, Phys. Rev. Lett. 123, 167202 (2019). [External link, PDF]
Q. Zhang, S. Okamoto, M. B. Stone, J. Liu, Y. Zhu, J. DiTusa, Z. Mao, and D. A. Tennant, Influence of magnetism on Dirac semimetallic behavior in nonstoichiometric Sr1−yMn1−zSb2 (y~0.07, z ~0.02), Phys. Rev. B 100, 205105 (2019). [External link, PDF]
S. Okamoto, T. Egami, and N. Nagaosa, Critical spin fluctuation mechanism for the spin Hall effect, Phys. Rev. Lett. 123, 196603 (2019). [External link, PDF]
B. C. Sales, J. Yan, W. R. Meier, A. D. Christianson, S. Okamoto, and M. A. McGuire, Electronic, magnetic, and thermodynamic properties of the kagome layer compound FeSn, Phys. Rev. Materials 3, 114203 (2019). [External link, PDF]
K. Saritas, J. T. Krogel, S. Okamoto, H.-N. Lee, and F. A. Reboredo, Structural, electronic, and magnetic properties of bulk and epitaxial LaCoO3 through diffusion Monte Carlo, Phys. Rev. Materials 3, 124414 (2019). [External link, PDF]
P. Laurell and S. Okamoto, Dynamical and thermal magnetic properties of the Kitaev spin liquid candidate α-RuCl3, npj Quantum Mater. 5, 2 (2020). [External link, arXiv]
J. A. Santana, J. T. Krogel, S. Okamoto, and F. A. Reboredo, Electron confinement and magnetism of (LaTiO3)1/(SrTiO3)5 heterostructure: A diffusion quantum Monte Carlo study, J. Chem. Theory Comput. 16, 643 (2020). [External link]
Y. Wang, Q. He, W. Ming, M.-H. Du, N. Lu, C. Cafolla, J. Fujioka, Q. Zhang, D. Zhang, S. Shen, Y. Lyu, A. T. N’Diaye, E. Arenholz, L. Gu, C. Nan, Y. Tokura, S. Okamoto, and P. Yu, Robust Ferromagnetism in Highly Strained SrCoO3 Thin Films, Phys. Rev. X 10, 021030 (2020). [External link, PDF]
E. Skoropata, J. Nichols, J. M. Ok, R. V. Chopdekar, E. S. Choi, A. Rastogi, C. Sohn, X. Gao, S. Yoon, T. Farmer, R. Desautels, Y. Choi, D. Haskel, J. W. Freeland, S. Okamoto, M. Brahlek, and H. N. Lee, Interfacial tuning of chiral magnetic interactions for large topological Hall effects in LaMnO3/SrIrO3 heterostructures, Sci. Adv. 6, eaaz3902 (2020). [External link]
R. Soni, N. Kaushal, S. Okamoto, and E. Dagotto, Flat bands and ferrimagnetic order in electronically correlated dice-lattice ribbons, Phys. Rev. B 102, 045105 (2020). [External link, PDF]
H. K. Yoshida, S. E. Dissanayake, A. D. Christianson, C. dela Cruz, Y.-Q. Cheng, S. Okamoto, K. Yamaura, M. Isobe, and M. Matsuda, Static and dynamic spin properties in a quantum triangular lattice antiferromagnet Ag2CoO2, Phys. Rev. B 102, 024445 (2020). [External link, PDF]
N. Mohanta, A. Taraphder, E. Dagotto, and S. Okamoto, Magnetic switching in Weyl semimetal-superconductor heterostructures, Phys. Rev. B 102, 064506 (2020). [External link, PDF]
S. Okamoto, Flipping handedness in ferrimagnets, Nat. Mater. 19, 929 (2020). [External link] This article discusses the results reported by Kim et al. Nat. Mater. 19, 980 (2020).
N. Mohanta, S. Okamoto, and E. Dagotto, Planar topological Hall effect from conical spin spirals, Phys. Rev. B 102, 064430 (2020). [External link, PDF]
W. R. Meier, M.-H. Du, S. Okamoto, N. Mohanta, A. F. May, M. A. McGuire, C. A. Bridges, G. D. Samolyuk, and B. C. Sales, Flat bands in the CoSn-type compounds, Phys. Rev. B 102, 075148 (2020). [External link, PDF]
W. Ko, M. Kolmer, J.-Q. Yan, A. D. Pham, M. Fu, F. Lüpke, S. Okamoto, Z. Gai, P. Ganesh, and A.-P. Li, Realizing gapped surface states in the magnetic topological insulator MnBi2−xSbxTe4, Phys. Rev. B 102, 115402 (2020). [External link, PDF]
M. Vogl, P. Laurell, H. Zhang, S. Okamoto, and G. A. Fiete, Resummation of the Holstein-Primakoff expansion and differential equation approach to operator square-roots, Phys. Rev. Research 2, 043243 (2020). [External link, PDF]
N. Mohanta, A. D. Christianson, S. Okamoto, and E. Dagotto, Signatures of a liquid-crystal transition in spin-wave excitations of skyrmions, Commun. Phys. 3, 229 (2020). [External link, arXiv]
G. Sala, M. B. Stone, Binod K. Rai, A. F. May, P. Laurell, V. O. Garlea, N. P. Butch, M. D. Lumsden, G. Ehlers, G. Pokharel, A. Podlesnyak, D. Mandrus, D. S. Parker, S. Okamoto, G. B. Halász, and A. D. Christianson, Van Hove singularity in the magnon spectrum of the antiferromagnetic quantum honeycomb lattice, Nat. Commun. 12, 171 (2021). [External link, arXiv]
A. R. Wildes, S. Okamoto, and D. Xiao, Search for nonreciprocal magnons in MnPS3, Phys. Rev. B 103, 024424 (2021). [External link, PDF]
X. Huang, T. Wang, S. Miao, C. Wang, Z. Li, Z. Lian, T. Taniguchi, K. Watanabe, S. Okamoto, D. Xiao, S.-F. Shi, and Y.-T. Cui, Correlated insulating states at fractional fillings of the WS2/WSe2 moiré lattice, Nat. Phys. 17, 715 (2021). [External link, arXiv]
W. R. Meier, B. C. Chakoumakos, S. Okamoto, M. A. McGuire, R. P. Hermann, G. D. Samolyuk, S. Gao, Q. Zhang, M. B. Stone, A. D. Christianson, and B. C. Sales, A catastrophic charge density wave in BaFe2Al9, Chem. Mater. 33, 2855 (2021). [External link, arXiv]
S. Shen, Z. Li, Z. Tian, W. Luo, S. Okamoto, and P. Yu, Emergent Ferromagnetism with Fermi-Liquid Behavior in Proton Intercalated CaRuO3, Phys. Rev. X 11, 021018 (2021). [External link, PDF]
M.-W. Yoo, J. Tornos, A. Sander, L.-F. Lin, N. Mohanta, A. Peralta, D. Sanchez-Manzano, F. Gallego, D. Haskel, J. W. Freeland, D. J. Keavney, Y. Choi, J. Strempfer, X. Wang, M. Cabero, H. B. Vasili, M. Valvidares, J. M. Gonzalez-Calbet, A. Rivera, C. Leon, S. Rosenkranz, M. Bibes, A. Barthelemy, A. Anane, E. Dagotto, S. Okamoto, S. G. E. te Velthuis, J. Santamaria, and J. E. Villegas, Large intrinsic anomalous Hall effect in SrIrO3 induced by magnetic proximity effect, Nat. Commun. 12, 3283 (2021). [External link]
H. Li, T. T. Zhang, A. Said, G. Fabbris, D. G. Mazzone, J. Q. Yan, D. Mandrus, G. B. Halász, S. Okamoto, S. Murakami, M. P. M. Dean, H. N. Lee, and H. Miao, Giant phonon anomalies in the proximate Kitaev quantum spin liquid α-RuCl3, Nat. Commun. 12, 3513 (2021). [External link, arXiv]
A. Scheie, P. Laurell, A. M. Samarakoon, B. Lake, S. E. Nagler, G. E. Granroth, S. Okamoto, G. Alvarez, and D. A. Tennant, Witnessing entanglement in quantum magnets using neutron scattering, Phys. Rev. B 103, 224434 (2021). [External link, PDF] This paper was selected as an Editors’ Suggestion.
P. Laurell, A. Scheie, C. J. Mukherjee, M. M. Koza, M. Enderle, Z. Tylczynski, S. Okamoto, R. Coldea, D. A. Tennant, and G. Alvarez, Quantifying and Controlling Entanglement in the Quantum Magnet Cs2CoCl4, Phys. Rev. Lett. 127, 037201 (2021). [External link, PDF]
N. Mohanta, S. Okamoto, and E. Dagotto, Skyrmion control of Majoranas States in planar Josephson junctions, Commun. Phys. 4, 163 (2021). [External link, arXiv]
Q. Zhang, S. Okamoto, G. D. Samolyuk, M. B. Stone, A. I. Kolesnikov, R. Xue, J. Yan, M. A. McGuire, D. Mandrus, and D. A. Tennant, Unusual Exchange Couplings and Intermediate Temperature Weyl State in Co3Sn2S2, Phys. Rev. Lett. 127, 117201 (2021). [External link, PDF]
J. M. Ok, M. Mohanta, J. Zhang, S. Yoon, S. Okamoto, E. S. Choi, H. Zhou, M. Briggeman, P. Irvin, A. R. Lupini, Y.-Y. Pai, E. Skoropata, C. Sohn, H. Li, H. Miao, B. Lawrie, W. S. Choi, G. Eres, J. Levy, and H. N. Lee, Correlated Oxide Dirac Semimetal in the Extreme Quantum Limit, Sci. Adv. 7, eabf9631 (2021). [External link, arXiv]
M. Sretenovic, S. Okamoto, G. Peiker, T. X. Tang, H. Zhang, C. Q. Xu, T. W. Heitmann, Q. Zhang, C. R. dela Cruz, and X. Ke, Competing energetic states in γ-Fe2WO6with strong spin-charge-lattice coupling, Phys. Rev. B 104, 134413 (2021). [External link, PDF]
R. Soni, A. B. Sanyal, N. Kaushal, S. Okamoto, A. Moreo, and E. Dagotto, Multitude of topological phase transitions in bipartite dice and Lieb lattices with interacting electrons and Rashba coupling, Phys. Rev. B 104, 235115 (2021). [External link, PDF]
N. Mohanta, J. M. Ok, J. Zhang, H. Miao, E. Dagotto, H.-N. Lee, and S. Okamoto, Semi-Dirac and Weyl fermions in transition metal oxides, Phys. Rev. B 104, 235121 (2021). [External link, PDF]
M. A. McGuire, Y.-Y. Pai, M. Brahlek, S. Okamoto, and R.G. Moore, Electronic and topological properties of the van der Waals layered superconductor PtTe, Phys. Rev. B 105, 184514 (2022). [External link, PDF]
A. M. Samarakoon, P. Laurell, C. Balz, A. Banerjee, P. Lampen-Kelley, D. Mandrus, S. E. Nagler, S. Okamoto, and D. A. Tennant, Extraction of the interaction parameters for α-RuCl3 from neutron data using machine learning, Phys. Rev. Research 4, L022061 (2022). [External link, PDF]
S. Li and S. Okamoto, Thermal Hall effect in the Kitaev-Heisenberg system with spin-phonon coupling, Phys. Rev. B 106, 024413 (2022). [External link, PDF]
Q. Zhang, Y. Zhang, M. Matsuda, V. O Garlea, J. Yan, M. A. McGuire, D. A. Tennant, and S. Okamoto, Hidden Local Symmetry Breaking in a Kagome-Lattice Magnetic Weyl Semimetal, J. Am. Chem. Soc. 144, 14339 (2022). [External link, arXiv]
P. Laurell, A. Scheie, D. A. Tennant, S. Okamoto, G. Alvarez, and E. Dagotto, Magnetic excitations, nonclassicality, and quantum wake spin dynamics in the Hubbard chain, Phys. Rev. B 106, 085110 (2022). [External link, PDF]
S. Okamoto, N. Mohanta, E. Dagotto, and D. N. Sheng, Topological flat bands in a kagome lattice multiorbital system, Commun. Phys. 5, 198 (2022). [External link, arXiv]
R. G. Moore, S. Okamoto, H. Li, W. R. Meier, H. Miao, H. N. Lee, M. Hashimoto, D. Lu, E. Dagotto, M. A. McGuire, and B. C. Sales, Topological electronic structure evolution with symmetry-breaking spin reorientation in (Fe1−xCox)Sn, Phys. Rev. B 106, 115141 (2022). [External link, PDF]
R. S. Fishman, J. S. Gardner, and S. Okamoto, Orbital Angular Momentum of Magnons in Collinear Magnets, Phys. Rev. Lett. 129, 167202 (2022). [External link, PDF]
R. S. Fishman, L. Lindsay, and S. Okamoto, Exact results for the orbital angular momentum of magnons on honeycomb lattices, J. Phys.: Condens. Matter 51, 015801 (2023). [External link, arXiv]
G. Cao, S. Okamoto, J. Guo, E. D. Specht, T. Z. Ward, M. A. McGuire, J. D. Budai, M. F. Chisholm, D. Mandrus, B. C. Sales, and Z. Gai, Magnetocaloric Effect in Lightly-Doped Fe5Si3 Single Crystals, Adv. Phys. Res. 2, 2200047 (2023). [External link]
E. Ergeçen, B. Ilyas, J. Kim, J. Park, M. B. Yilmaz, T. Luo, D. Xiao, S. Okamoto, J.-G. Park, and N. Gedik, Coherent detection of hidden spin-lattice coupling in a van der Waals antiferromagnet, Proc. Natl. Acad. Sci. U.S.A. 120, e2208968120 (2023). [External link, arXiv]
M. A. McGuire, H. Zhang, A. F. May, S. Okamoto, R. G. Moore, X. Wang, C. Girod, S. M. Thomas, F. Ronning, and J. Q. Yan, Superconductivity by alloying the topological insulator SnBi2Te4, Phys. Rev. Materials 7, 034802 (2023). [External link, PDF]
M. A. McGuire, E. M. Clements, Q. Zhang, and S. Okamoto, Double-layer Kagome Metals Pt3Tl2 and Pt3In2, Crystals 13, 833 (2023). [External link, arXiv]
R. G. Moore, T. Smith, X. Yao, Y.-Y. Pai, M. Chilcote, H. Miao, S. Okamoto, S. Oh, and M. Brahlek, Monolayer superconductivity and tunable topological electronic structure at the Fe(Te,Se)/Bi2Te3 interface, Adv. Mater. 35, 2210940 (2023). [External link, arXiv]
J. W. Villanova, A. O. Scheie, D. A. Tennant, S. Okamoto, and T. Berlijn, First-principles derivation of magnetic interactions in the triangular quantum spin liquid candidates KYbCh2 (Ch= S, Se, Te) and AYbSe2 (A=Na, Rb), Phys. Rev. Research 5, 033050 (2023). [External link, PDF]
S. Li, L.-H. Hu, R.-X. Zhang, and S. Okamoto, Topological superconductivity from forward phonon scatterings, Commun. Phys. 6, 235 (2023). [External link, arXiv]
A. Scheie, P. Park, J. W. Villanova, G. E. Granroth, C. L. Sarkis, H. Zhang, M. B. Stone, J.-G. Park, S. Okamoto, T. Berlijn, and D. A. Tennant, Spin wave Hamiltonian and anomalous scattering in NiPS3, Phys. Rev. B 108, 104402 (2023). [External link, PDF]
N. Mohanta, R. Soni, S. Okamoto, and E. Dagotto, Commun. Majorana corner states in the dice lattice, Commun. Phys. 6, 240 (2023). [External link, arXiv]
T. A. Maier and S. Okamoto, Weak-coupling theory of neutron scattering as a probe of altermagnetism, Phys. Rev. B 108, L100402 (2023). [External link, PDF]
H. Miao, T. T. Zhang, H. X. Li, G. Fabbris, A. H. Said, R. Tartaglia, T. Yilmaz, E. Vescovo, S. Murakami, L. X. Feng, K. Jiang, X. L. Wu, A. F. Wang, S. Okamoto, Y. L. Wang, and H. N. Lee, Signature of spin-phonon coupling driven charge density wave in a kagome magnet, Nat. Commun. 14, 6183 (2023). [External link, arXiv]
C. Fang, C. Wan, X. Zhang, S. Okamoto, T. Ma, J. Qin, X. Wang, C. Guo, J. Dong, G. Yu, Z. Wen, N. Tang, S. S. P. Parkin, N. Nagaosa, Y. Lu, and X. Han, Observation of the Fluctuation Spin Hall Effect in a Low-Resistivity Antiferromagnet, Nano Lett. 23, 11485 (2023). [External link, arXiv]
A. O. Scheie, Y. Kamiya, H. Zhang, S. Lee, A. J. Woods, M. O. Ajeesh, M. G. Gonzalez, B. Bernu, J. W. Villanova, J. Xing, Q. Huang, Q. Zhang, J. Ma, E. S. Choi, D. M. Pajerowski, H. Zhou, A. S. Sefat, S. Okamoto, T. Berlijn, L. Messio, R. Movshovich, C. D. Batista, and D. A. Tennant, Nonlinear magnons and exchange Hamiltonians of the delafossite proximate quantum spin liquid candidates KYbSe2 and NaYbSe2, Phys. Rev. B 109, 014425 (2024). [External link, PDF] This paper was selected as an Editors’ Suggestion.
S. Okamoto and N. Nagaosa, Critical enhancement of the spin Hall effect by spin fluctuations, npj Quantum Mater. 9, 29 (2024). [External link, arXiv]
B. Pandey, S. Okamoto, and E. Dagotto, Nontrivial fusion of Majorana zero modes in interacting quantum-dot arrays, Phys. Rev. Research 6, 033314 (2024). [External link]
E. M Clements, D. Ovchinnikov, P. R. Raghuvanshi, V. R. Cooper, S. Okamoto, A. D. Christianson, J. A. M. Paddison, B. R. Ortiz, S. Calder, A. F. May, X. Xu, J. Yan, and M. A. McGuire, MnRhBi3: A Cleavable Antiferromagnetic Metal, Chem. Mater. 36, 11306 (2024). [External link]
P. Laurell, B. Pandey, G. B. Halász, S. Okamoto, G. Alvarez, and E. Dagotto, Pairing tendencies in the doped Kitaev-Heisenberg model, Phys. Rev. B 110, 224518 (2024). [External link]
A. F. May, C. Tabata, S. Okamoto, B. R. Ortiz, A. D. Christianson, J. Yan, K. Kaneko, and M. A. McGuire, Physical properties of intergrowth compound Eu2CuZn2P3, Phys. Rev. Materials 9, 024406 (2025). [External link] This paper was selected as an Editors’ Suggestion.
B. Pandey, G. K. Gupta, G. Alvarez, S. Okamoto, and E. Dagotto, Diabatic error and propagation of Majorana zero modes in interacting quantum dots systems, Phys. Rev. B 111, 104311 (2025). [External link]
S. Okamoto, N. Mohanta, H. N. Lee, A. Moreo, and E. Dagotto, Novel phenomena in transition-metal oxide thin films and heterostructures with strong correlations and spin-orbit coupling, Phys. Rev. Materials 9, 050301 (2025). [External link, arXiv]
L. A. Pressley, C. L. Sarkis, J. Felder, C. R. Dela Cruz, R. R. Unocic, Z. Gai, J. D. Einkauf, S. P. Pethe, M. P. Paranthaman, T. Berlijn, J. W. Villanova, S. Okamoto, M. A. McGuire, D. A. Tennant, S. E. Nagler, and C. A. Bridges, Synthesis and Characterization of Metastable Cobalt Honeycomb KCoAsO4, Inorg. Chem. 64, 13696 (2025). [External link]
B. R. Ortiz, H. Zhang, K. Gornicka, M. S. Cook, S. Sarker, S. Okamoto, J. Yan, Isolated spin ladders in Ln2Ti9Sb11 (Ln:La-Nd) metals, Phys. Rev. Materials 9, 086203 (2025). [External link, arXiv]
Y. Zhang, L.-F. Lin, A. Moreo, S. Okamoto, T. A. Maier, and E. Dagotto, Electronic structure, magnetic and superconducting pairing tendencies of the alternating single layer-bilayer stacking nickelate La5Ni3O11 under Pressure, Phys. Rev. B 112, 094515 (2025). [External link, arXiv]
Y. Zhang, L.-F. Lin, A. Moreo, S. Okamoto, T. A. Maier, E. Dagotto, General trends of superconducting pairing and magnetic correlations in the Ruddlesden-Popper nickelate m-layered superconductors Lam+1NimO3m+1, Phys. Rev. B 112, 094517 (2025). [External link, arXiv]
S. A. Ekahana, S. Okamoto, J. Dreiser, L. Roduit, D. J. Gawryluk, A. Hunter, A. Tamai, Y. Soh, Inhomogeneity in electronic phase and flat band in magnetic kagome metal Co3Sn2S2, Commun. Mater. 6, 235 (2025). [External link, arXiv]
J. Song, S.-H. Kang, L. Lindsay, S. Okamoto, Y. Park, H. Miao, J. M. Ok, and H. N. Lee, Symmetry-engineered chiral magnetotransport in the correlated oxide SrNbO3, npj Quantum Mater. 11, 15 (2026). [External link]