RIKEN Center for Emergent Matter Science Strong Correlation Physics Research Group

Group Director: Yoshinori Tokura (D.Eng.)

Japanese Page

Research Summary

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).