RIKEN Center for Emergent Matter Science Topological Electronics Research Team

Team Director: Minoru Kawamura (Ph.D.)

Japanese Page

Research Summary

Our team studies quantum transport phenomena in electron systems in solids. In particular, we focus on thin-film crystals and heterostructures of materials with strong spin-orbit interaction, and conduct experimental studies on quantum transport phenomena in which electron correlation and geometric phase play important roles. Through these studies, we aim to discover new quantum phenomena that expand our understanding of condensed matter physics and open the door to new technologies by pioneering their application to electronics and spintronics functions.

Main Research Fields

Mathematical & Physical Sciences

Related Research Fields

Engineering
Interdisciplinary Science & Engineering
Semiconductors, optical properties of condensed matter and atomic physics-related
Magnetism, superconductivity and strongly correlated systems-related
Nanostructural physics-related

Keywords

Topological insulator
Topological superconductor
Thin films and interfaces
Quantum transport phenomena
Anomalous Hall effect

Selected Publications

1.Kawamura, M., Mogi, M., Yoshimi, R., Morimoto, T., Takahashi, K. S., Tsukazaki, A., Nagaosa, N., Kawasaki, M., and Tokura, Y.:
"Laughlin charge pumping in a quantum anomalous Hall insulator"
Nat. Phys. 19, 333 (2023).
2.Mogi, M., Okamura, Y., Kawamura, M., Yoshimi, R., Yasuda, K., Tsukazaki, A., Takahashi, K. S., Morimoto, T., Nagaosa, N., Kawasaki, M., Takahashi, Y., and Tokura, Y.:
"Experimental signature of the parity anomaly in a semi-magnetic topological insulator"
Nat. Phys. 18, 390 (2022).
3.Okazaki, Y., Oe, T., Kawamura, M., Yoshimi, R., Nakamura, S., Takada, S., Mogi, M., Takahashi, K. S., Tsukazaki, A., Kawasaki, M., Tokura, Y., and Kaneko, N. -H.:
"Quantum anomalous Hall effect with a permanent magnet defines a quantum resistance standard"
Nat. Phys. 18, 25 (2022).
4.Kawamura, M., Mogi, M., Yoshimi, R., Tsukazaki, A., Kozuka, Y., Takahashi, K. S., Kawasaki, M., and Tokura, Y.:
"Topological quantum phase transition in magnetic topological insulator upon magnetization rotation"
Phys. Rev. B 98, 140404 (2018).
5. Mogi, M., Kawamura, M., Yoshimi, R., Tsukazaki, A., Kozuka, Y., Shirakawa, N., Takahashi, K. S., Kawasaki, M., and Tokura, Y.:
"A magnetic heterostructure of topological insulators as a candidate for an axion insulator"
Nat. Mater. 16, 516 (2017).

Lab Members

Principal investigator

Minoru Kawamura: Team Director

Core members

Ryo Ogawa: Research Scientist
Yuki Sato: Postdoctoral Researcher

Contact Information

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