Centers & Labs

RIKEN Center for Emergent Matter Science

Strong Correlation Theory Research Group

Group Director: Naoto Nagaosa (D.Sci.)
Naoto  Nagaosa(D.Sci.)

We study theoretically the strongly correlated electronic states in solids from the viewpoint of topology and explore new functions, including non-dissipative currents. Combining first-principles electronic structure calculations, analytic methods of quantum field theory and numerical analysis of models for correlated systems, we predict and design magnetic, optical, transport and thermal properties of correlated electrons focusing on their internal degrees of freedom such as spin and orbital. In particular, we study extensively the nontrivial interplay between these various properties, i.e., cross-correlation, and develop new concepts such as electron fractionalization and non-dissipative quantum operation by considering the topology given by the relativistic spin-orbit interaction and/or spin textures.

Main Research Field

Mathematical and physical sciences

Related Research Fields

Interdisciplinary science and engineering

Keywords

  • Electrons in solids
  • Spintronics
  • Superconductivity
  • Thermal transport

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.
  1. T. Morimoto and N. Nagaosa:
    "Chiral Anomaly and Giant Magnetochiral Anisotropy in Noncentrosymmetric Weyl Semimetals"
    Phys. Rev. Lett. 117, 146603. (2016)
  2. T. Morimoto and N. Nagaosa:
    "Topological nature of nonlinear optical effects in solids"
    SCIENCE ADVANCES 2, e1501524. (2016)
  3. A. S. Mishchenko, N. Nagaosa, N. Prokof’ev.:
    "Diagrammatic Monte Carlo Method for Many-Polaron Problems"
    Phys. Rev. Lett. 113, 166402. (2014).
  4. M. Mochizuki, XZ. Yu, S. Seki, N. Kanazawa, W, Koshibae, J. Zang, M. Mostovoy, Y. Tokura, N. Nagaosa.:
    "Thermally driven ratchet motion of a skyrmion microcrystal and topological magnon Hall effect"
    Nature Materials 13, 241. (2014).
  5. J. Iwasaki, M. Mochizuki, N. Nagaosa.:
    "Universal current-velocity relation of skyrmion motion in chiral magnets"
    Nature Communications 4, 1463. (2013).
  6. N. Nagaosa, J. Sinova, S. Onoda, A. H. MacDonald, N. P. Ong.:
    "Anomalous Hall effect"
    Rev. Mod. Phys. 82, 1539. (2010).
  7. Y. Onose, et al.:
    "Observation of the Magnon Hall Effect"
    Science 329, 297. (2010).
  8. * P. A. Lee, N. Nagaosa, X. G. Wen.:
    "Doping a Mott insulator: Physics of high-temperature superconductivity"
    Rev. Mod. Phys. 78, 17. (2006).
  9. * S. Murakami, N. Nagaosa, S. C. Zhang.:
    "Dissipationless quantum spin current at room temperature"
    Science 301, 1348. (2003).
  10. * Z. Fang, et al.:
    "The anomalous Hall effect and magnetic monopoles in momentum space"
    Science 302, 92. (2003).

Lab Members

Principal Investigator

Naoto Nagaosa
Group Director

Core Members

Wataru Koshibae
Senior Scientist
Andrey Mishchenko
Senior Scientist
Jun He
Postdoctoral Researcher
Ryota Nakai
Special Postdoctoral Researcher
Akihiko Sekine
Special Postdoctoral Researcher
Daichi Kurebayashi
Special Postdoctoral Researcher
Tze Tzen Ong
Visiting Scientist
Bohm-Jung Yang
Visiting Scientist
Takahiro Morimoto
Visiting Scientist
Shintaro Hoshino
Visiting Scientist

Contact information

Frontier Research Laboratory, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

Email: nagaosa [at] riken.jp

Related links

Recent research results

December 6, 2018: Press Release
First observation of a square lattice of merons and antimerons
April 20, 2018: RIKEN RESEARCH
Material defects hinder the dynamics of magnetic skyrmions
August 4, 2017: RIKEN RESEARCH
An uneven resistance
March 3, 2017: RIKEN RESEARCH
Weyl fermions, on the other hand