Prof. Kazuya ANDO
Department of Applied Physics and Physico-Informatics,
Keio University
Date & Time: 14:00 - 15:00, June 12th (Thu), 2025.
Place: 8F Conference Room, Main Bldg., Sengen.
(The 280th Special CMSM seminar)
Orbitronics: Harnessing Orbital Currents in Solids
Prof. Kazuya ANDO
Department of Applied Physics and Physico-Informatics,
Keio University
Abstract:
Orbitronics is an emerging field that explores the physics and applications of orbital current—the flow of orbital angular momentum—in solid-state systems. During the rapid progress of spintronics, which has traditionally focused on electron spin as the primary carrier of angular momentum, the role of orbital angular momentum had long been regarded as negligible due to the conventional belief that it is quenched by crystal fields. However, recent theoretical and experimental advances have challenged this assumption, demonstrating that orbital currents play a fundamental role in angular momentum dynamics. In particular, the orbital Hall effect and the orbital Rashba-Edelstein effect have emerged as key mechanisms for the generation and detection of orbital currents. These developments have led to the discovery of a variety of phenomena arising from the interaction between orbital currents and magnetization, establishing orbitronics as a new frontier in condensed matter physics. In this talk, I will discuss the generation mechanisms of orbital currents, along with emerging phenomena resulting from their interaction with magnetization [1-4].
References
[1] H. Hayashi, D. Jo, D. Go, T. Gao, S. Haku, Y. Mokrousov, H.-W. Lee, and K. Ando, Commun. Phys. 6, 32 (2023).
[2] H. Moriya, M. Taniguchi, D. Jo, D. Go, N. Soya, H. Hayashi, Y. Mokrousov, H.-W. Lee, and K. Ando, Nano Lett. 24, 6451 (2024).
[3] H. Hayashi, D. Go, S. Haku, Y. Mokrousov, and K. Ando, Nature Electron. 7, 646 (2024).
[4] T. Gao, P. Rüßmann, Q. Wang, R. Fukunaga, H. Hayashi, D. Go, T. Harumoto, R. Tu, S. Zhang, L. Zhang, Y. Mokrousov, J. Shi, and K. Ando, Nature Phys. 20, 1896 (2024).
References
[1] H. Hayashi, D. Jo, D. Go, T. Gao, S. Haku, Y. Mokrousov, H.-W. Lee, and K. Ando, Commun. Phys. 6, 32 (2023).
[2] H. Moriya, M. Taniguchi, D. Jo, D. Go, N. Soya, H. Hayashi, Y. Mokrousov, H.-W. Lee, and K. Ando, Nano Lett. 24, 6451 (2024).
[3] H. Hayashi, D. Go, S. Haku, Y. Mokrousov, and K. Ando, Nature Electron. 7, 646 (2024).
[4] T. Gao, P. Rüßmann, Q. Wang, R. Fukunaga, H. Hayashi, D. Go, T. Harumoto, R. Tu, S. Zhang, L. Zhang, Y. Mokrousov, J. Shi, and K. Ando, Nature Phys. 20, 1896 (2024).
(Contact)
Ken-ichi Uchida, Spin Caloritronics Group
E-mail: UCHIDA.Kenichi[at]nims.go.jp
E-mail: UCHIDA.Kenichi[at]nims.go.jp