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Chief Scientist Laboratories Condensed Matter Theory Laboratory

Chief Scientist: Akira Furusaki (D.Sci.)

Research Summary

Akira  Furusaki(D.Sci.)

We aim to understand theoretically various properties of materials of macroscopic scale from the physical laws that govern microscopic world. Many-electron systems having infinite degrees of freedom exhibit rich physical phenomena: they can have phases with spontaneously broken symmetry and transitions among these phases. A typical example is offered by magnetism and superconductivity in strongly-correlated electron systems, such as transition metal oxides and molecular conductors, which are the main research subjects of our laboratory. Our recent research subjects include unconventional ordered states and spin liquids in strongly frustrated quantum magnets and other new kinds of quantum phases like topological insulators and topological superconductors. Furthermore, we study quantum phenomena in mesoscopic systems of nanometer scale and statistical physics of random systems.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Interdisciplinary Science & Engineering
  • Physics

Keywords

  • Condensed Matter Theory
  • Electric Transport
  • Magnetism
  • Superconductivity

Selected Publications

  • 1. Fuji, Y. and Furusaki, A.:
    From coupled wires to coupled layers: Model with three-dimensional fractional excitations"
    Phys. Rev. B 99, 241107 (2019).
  • 2. Mudry, C., Furusaki, A., Morimoto, T., and Hikihara, T.:
    Quantum phase transitions beyond Landau-Ginzburg theory in one-dimensional space revisited"
    Phys. Rev. B 99, 205153 (2019)
  • 3. Naka, M., Hayami, S., Kusunose, H., Yanagi, Y., Motome, Y., and Seo, H.:
    Spin current generation in organic antiferromagnets"
    Nature Commun. 10, 4305 (2019)
  • 4. Onoda, S. and Ishii, F.:
    First-principles design of the spinel iridate Ir2O4 for high-temperature quantum spin ice"
    Phys. Rev. Lett. 122, 067201 (2019)
  • 5. Ueda, H., Morimoto, T., and Momoi, T.:
    Symmetry protected topological phases in two-orbital SU(4) fermionic atoms"
    Phys. Rev. B 98, 045128 (2018)
  • 6. Plat, X., Momoi, T., and Hotta, C.:
    Kinetic frustration induced supersolid in the S=1/2 kagome lattice antiferromagnet in a magnetic field"
    Phys. Rev. B 98, 014415 (2018)
  • 7. Bojesen, T.A. and Onoda, S.:
    Quantum spin ice under a [111] magnetic field: from pyrochlore to kagome"
    Phys. Rev. Lett. 119, 227204 (2017)
  • 8. Yang, B.J., Bojesen, T.A., Morimoto, T., and Furusaki, A.:
    Topological semimetals protected by off-centered symmetries in nonsymmorphic crystals"
    Phys. Rev. B 95, 075135 (2017)
  • 9. Morimoto, T., Furusaki, A., and Mudry, C.:
    Anderson localization and the topology of classifying spaces"
    Phys. Rev. B 91, 235111 (2015)
  • 10. Morimoto, T., Furusaki, A., and Mudry, C.:
    Breakdown of the topological classification Z for gapped phases of noninteracting fermions by quartic interactions"
    Phys. Rev. B 92, 125104 (2015)

Recent Research Results

Annual research report

Related Links

Lab Members

Principal investigator

Akira Furusaki
Chief Scientist

Core members

Tsutomu Momoi
Senior Research Scientist
Shigeki Onoda
Senior Research Scientist
Hitoshi Seo
Senior Research Scientist
Shuntaro Sumita
Postdoctoral Researcher
Takuya Furusawa
Student Trainee

Contact Information

2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: furusaki [at] riken.jp

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