Theoretical Study of Strongly Correlated Electron Systems
Satoshi Okamoto Oak Ridge National Laboratory

Recent Publications (past 5 years)

  1. 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,” arXiv:2204.08066.
  2. H. Idzushi, M. Kimata, S. Okamoto, P. Laurell, N. Mohanta, M. Cothrine, S. E. Nagler, D. Mandrus, A. Banerjee, and Y. P. Chen, “Spin sensitive transport in a spin liquid material: revealing a robustness of spin anisotropy,” arXiv:2204.03158.
  3. R. S. Fishman, J. S. Gardner, and S. Okamoto, “Orbital Angular Momentum of Magnons in Collinear Magnets,” arXiv:2203.15677.
  4. 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,” arXiv:2203.06655.
  5. P. Laurell, A. Scheie, D. A. Tennant, S. Okamoto, G. Alvarez, and E. Dagotto, “Magnetic excitations, non-classicality and quantum wake spin dynamics in the short-range Hubbard chain,” arXiv:2203.06332.
  6. 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,” arXiv:2202.10715.
  7. Q. Zhang, Y. Zhang, M. Matsuda, V. O Garlea, J. Yan, M. A. McGuire, D. A. Tennant, and S. Okamoto, “Local symmetry breaking with correlation to ferromagnetism and the Weyl state in Co3Sn2S2,” arXiv:2202.08428.
  8. S. Okamoto, N. Mohanta, E. Dagotto, and D. N. Sheng, “Topological flat bands in a kagomé lattice multiorbital system,” arXiv:2201.11530.
  9. S. Li and S. Okamoto, “Thermal Hall Effect in the Kitaev-Heisenberg System with Spin-Phonon Coupling,” arXiv:2112.06107.
  10. N. Mohanta, J. M. Ok, J. Zhang, H. Miao, E. Dagotto, H.-N. Lee, and S. Okamoto, “Semi-Dirac and Weyl Ffermions in transition metal oxides,” Phys. Rev. B 104, 235121 (2021).
  11. 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).
  12. H. Li, A. Said, J. Q. Yan, D. M. Mandrus, H. N. Lee, S. Okamoto, G. B. Halász, and H. Miao, “Divergence of Majorana-Phonon Scattering in Kitaev Quantum Spin Liquid,” arXiv:2112.02015.
  13. 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).
  14. 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).
  15. 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).
  16. N. Mohanta, S. Okamoto, and E. Dagotto, “Skyrmion control of MajoranasStates in planar Josephson junctions,” Commun. Phys. 4, 163 (2021).
  17. 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).
  18. 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). This paper was selected as an Editors' Suggestion.
  19. 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).
  20. 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).
  21. 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).
  22. 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).
  23. 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).
  24. A. R. Wildes, S. Okamoto, and D. Xiao, “Search for nonreciprocal magnons in MnPS3,” Phys. Rev. B 103, 024424 (2021).
  25. 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).
  26. 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).
  27. 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).
  28. W. Ko, M. Kolmer, J.-Q. Yan, A. D. Pham, M. Fu, F. Lüpke, S. Okamoto, Z. Gai,. Ganesh, and A.-P. Li, “Realizing gapped surface states in the magnetic topological insulator MnBi2−xSbxTe4,” Phys. Rev. B 102, 115402 (2020).
  29. 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).
  30. N. Mohanta, S. Okamoto, and E. Dagotto, “Planar topological Hall effect from conical spin spirals,” Phys. Rev. B 102, 064430 (2020).
  31. S. Okamoto, “Flipping handedness in ferrimagnets,” Nat. Mater. 19, 929 (2020). This article discusses the results reported by Kim et al. Nat. Mater. 19, 980 (2020).
  32. N. Mohanta, A. Taraphder, E. Dagotto, and S. Okamoto, “Magnetic switching in Weyl semimetal-superconductor heterostructures,” Phys. Rev. B 102, 064506 (2020).
  33. 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).
  34. 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).
  35. 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).
  36. W. Jiao, D. Z. Hou, C. Chen, H. Wang, Y. Z. Zhang, Y. Tian, Z. Y. Qiu, S. Okamoto, K. Watanabe, A. Hirata, T. Egami, E. Saitoh, and M. W. Chen, “Metallic glasses for spintronics: anomalous temperature dependence and giant enhancement of inverse spin Hall effect,” arXiv:1808.10371.
  37. 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).
  38. 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).
  39. P. Laurell and S. Okamoto, “Dynamical and thermal magnetic properties of the Kitaev spin liquid candidate α-RuCl3,” npj Quantum Mater. 5, 2 (2020).
  40. 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).
  41. 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).
  42. S. Okamoto, T. Egami, and N. Nagaosa, “Critical spin fluctuation mechanism for the spin Hall effect,” Phys. Rev. Lett. 123, 196603 (2019).
  43. 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).
  44. X. Zhang, Y. Zhang, S. Okamoto, and D. Xiao, “Thermal Hall Effect Induced by Magnon-Phonon Interactions,” Phys. Rev. Lett. 123, 167202 (2019).
  45. 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). This paper was selected as an Editors' Suggestion.
  46. 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). This paper was selected as an Editors' Suggestion.
  47. 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).
  48. 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).
  49. N. Sivadas, S. Okamoto, X. Xu, C. J. Fennie, and D. Xiao, “Stacking-dependent magnetism in bilayer CrI3,” Nano Lett. 18, 7658 (2018).
  50. 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).
  51. Y. Zhang, S. Okamoto, and D. Xiao “Spin-Nernst effect in the paramagnetic regime of an antiferromagnetic insulator,” Phys. Rev. B 98, 035424 (2018).
  52. 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).
  53. 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).
  54. 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).
  55. S. Okamoto and D. Xiao, “Transition-metal oxide (111) bilayers,” J. Phys. Soc. Jpn. 87, 041006 (2018). This paper is published as a contribution to Special Topics: New ab initio Approaches to Exploring Emergent Phenomena in Quantum Matter.
  56. 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)
  57. 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).
  58. R. S. Fishman and S. Okamoto, “Spiral spin state with open boundary conditions in a magnetic field,” Phys. Rev. B 96, 014439 (2017).
  59. 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).
Satoshi Okamoto, Materials Science and Technology Division, Oak Ridge National Laboratory
PO Box 2008 MS6114, Oak Ridge, TN 37831, USA
Fax: +1 865-576-4944