Recent Publications (past 5 years)

  1. S. Okamoto, W. Zhu, Y. Nomura, R. Arita, D. Xiao, and N. Nagaosa, “Correlation effects in (111) bilayers of perovskite transition-metal oxides,” arXiv:1401.0009.
  2. M. Sekino, S. Okamoto, W. Koshibae, M. Mori, S. Maekawa “Temperature Dependence of Thermopower in Strongly Correlated Multiorbital Systems,” arXiv:1308.0416.
  3. 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).
  4. 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).
  5. 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, D. G. Mandrus, “Microscopic and Spectroscopic Evidence for a Slater Metal-Insulator Transition in Sr2IrO4,” Sci. Rep. 3, 3073 (2013).
  6. 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).
  7. 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).
  8. S. Okamoto, “Global phase diagram of a doped Kitaev-Heisenberg model,” Phys. Rev. B 87, 064508 (2013).
  9. 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). This paper is spotlighted as a Synopsis in Physics: Building Better Solar Cells, Layer by Layer
  10. 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).
  11. 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).
  12. S. Okamoto, “Strongly-Correlated Heterostructures,” in Multifunctional Oxide Heterostructures, Eds. E. Y. Tsymbal, E. R. A. Dagotto, C.-B. Eom, and R. Ramesh (Oxford University Press, 2012), p.214-253, ISBN: 978-0-19-958412-3.
  13. 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).
  14. S. Okamoto, “Anomalous mass enhancement in strongly correlated quantum wells,” Phys. Rev. B 84, 201305(R) (2011).
  15. 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).
  16. 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).
  17. 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 [6] 1931-1939 (2011).
  18. 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). This paper was selected as an Editors' Suggestion.
  19. 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).
  20. 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).
  21. S. Okamoto, D. Sénéchal, M. Civelli, and A.-M. Tremblay, “Dynamical electronic nematicity from Mott physics,” Phys. Rev. B 82, 180511(R) (2010). This paper was selected as an Editors' Suggestion.
  22. 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).
  23. 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).
  24. S. Okamoto, “Magnetic interaction at an interface between manganite and other transition-metal oxides,” Phys. Rev. B 82, 024427 (2010).
  25. 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).
  26. 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).
  27. 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).
  28. 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).
  29. 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).
  30. 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).
  31. 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).
  32. S. Okamoto, “Surface magnetic phase transition of the double-exchange ferromagnet: Schwinger-boson mean-field study,” J. Phys.: Condens. Matter 21, 355601 (2009).
  33. R. S. Fishman, S. Okamoto, and F. A. Reboredo, “Spin-orbit coupling and Jahn-Teller distortion in bimetallic oxalates,” Polyhedron 28, 1740 (2009).
Full Publication list is here.