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RIKEN Center for Emergent Matter Science Strong Correlation Physics Research Group

Group Director: Yoshinori Tokura (D.Eng.)

Research Summary

Yoshinori  Tokura(D.Eng.)

Our group investigates a variety of emergent phenomena in strongly correlated electron systems, which cannot be understood within the framework of conventional semiconductor/metal physics, to construct a new scheme for the relevant science. In particular, we focus on transport and optical properties in non-trivial spin/orbital structures, aiming at clarifying the correlation between the responses and spin/orbital state. In addition, we investigate electron systems with strong spin-orbit interaction, unraveling its impact on transport phenomena and other electronic properties.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Interdisciplinary Science & Engineering
  • Chemistry

Keywords

  • strongly correlated electrons system
  • colossal magnetoresistance
  • high-temperature superconductors
  • multiferroics
  • topological insulators

Selected Publications

  • 1. Birch, T. M., Belopolski, I., Fujishiro, Y., Kawamura, M., Kikkawa, A., Taguchi, Y., Hirschberger, M., Nagaosa, N., and Tokura, Y.:
    "Dynamic transition and Galilean relativity of current-driven skyrmions"
    Nature, 633, 554 (2024).
  • 2. Ueda, K., Yu, T., Hirayama, M., Kurokawa, R., Nakajima, T., Saito, H., Kriener, M., Hoshino, M., Hashizume, D., Arima, T.-h., Arita, R., and Tokura, Y.:
    "Colossal negative magnetoresistance in field-induced Weyl semimetal of magnetic half-Heusler compound",
    Nat. Commun. 14, 6339 (2023).
  • 3. Hori, T., Kanazawa, N., Hirayama, M., Fujiwara, K., Tsukazaki, A., Ichikawa, M., Kawasaki, M., and Tokura, Y.:
    "A Noble-Metal-Free Spintronic System with Proximity-Enhanced Ferromagnetic Topological Surface State of FeSi above Room Temperature"
    Adv. Mater. 35, 2206801 (2022).
  • 4. Kitaori, A., Kanazawa, N., Yokouchi, T., Kagawa, F., Nagaosa, N., and Tokura, Y.:
    "Emergent electromagnetic induction beyond room temperature"
    Proc. Natl. Acad. Sci. U.S.A. 118, e2105422118 (2021).
  • 5. Fujishiro, Y., Kanazawa, N., Kurihara, R., Ishizuka, H., Hori, T., Yasin, F. S., Yu, X.Z., Tsukazaki, A., Ichikawa, M., Kawasaki, M., Nagaosa, N., Tokunaga, M., and Tokura, Y.:
    "Giant anomalous Hall effect from spin-chirality scattering in a chiral magnet"
    Nat. Commun., 12, 317 (2021).
  • 6. Yokouchi, T., Kagawa, F., Hirschberger, M., Otani, Y., Nagaosa, N., and Tokura, Y.:
    "Emergent electromagnetic induction in a helical-spin magnet"
    Nature, 586, 232 (2020).
  • 7. Kurumaji, T., Nakajima, T., Hirschberger, M., Kikkawa, A., Yamasaki, Y., Sagayama, H., Nakao, H., Taguchi, Y., Arima, T., and Tokura, Y.:
    "Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet"
    Science, 365, 914 (2019).
  • 8. Fujishiro, Y., Kanazawa, N., Nakajima, T., Yu, X. Z., Ohishi, K., Kawamura, Y., Kakurai, K., Arima, T., Mitamura, H., Miyake, A., Akiba, K., Tokunaga, M., Matsuo, A., Kindo, K., Koretsune, T., Arita, R., and Tokura, Y.:
    "Topological transitions among skyrmion- and hedgehog-lattice states in cubic chiral magnets"
    Nat. Commun., 10, 1059 (2019).
  • 9. Kurumaji, T., Nakajima, T., Ukleev, V., Feoktystov, A., Arima, T., Kakurai, K., and Tokura, Y.:
    "Neel-Type Skyrmion Lattice in the Tetragonal Polar Magnet VOSe2O5"
    Phys. Rev. Lett., 119, 237201 (2017).
  • 10. Yokouchi, T., Kanazawa, N., Kikkawa, A., Morikawa, D., Shibata, K., Arima, T., Taguchi, Y., Kagawa, F., and Tokura, Y.:
    "Electrical magnetochiral effect induced by chiral spin fluctuations"
    Nat. Commun. 8, 866 (2017).

Recent Research Results

Related Links

Lab Members

Principal investigator

Yoshinori Tokura
Group Director

Core members

Masamichi Nakajima
Senior Scientist
Chieko Terakura
Senior Technical Scientist
Yoshio Kaneko
Research Consultant
Izumi Hirabayashi
Research Consultant
Masakazu Ichikawa
Research Consultant
Yasushi Ogimoto
Senior Visiting Scientist

Contact Information

Frontier Research Laboratory,
2-1 Hirosawa, Wako, Saitama
351-0198, Japan
Email: tokura@riken.jp

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