Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session F54: Terahertz Spintronics and Spin-Torque Driven Magnetization Dynamics
8:00 AM–10:24 AM,
Tuesday, March 15, 2022
Room: McCormick Place W-476
Sponsoring
Units:
GMAG DMP
Chair: Jonathan Daniel Gibbons, UIUC
Abstract: F54.00008 : Photogalvanic spin current of magnons in magnetic insulators*
10:12 AM–10:24 AM
Presenter:
Hiroaki Ishizuka
(Tokyo Institute of Technology, Tokyo)
Authors:
Hiroaki Ishizuka
(Tokyo Institute of Technology, Tokyo)
Masahiro Sato
(Ibaraki University)
Using a nonlinear response formalism [1,2], we find the nonlinear conductivity consists of two contributions: contribution involving one magnon band, and that involving two bands. The former is related to those studied recently, whereas the latter is a contribution unknown to date. We argue that the two-band process produces a large photogalvanic spin current in the antiferromagnetic phase of bilayer CrI3, whose resonance frequency can be tuned between GHz-THz range by an external magnetic field. Our finding opens a route to studies on the photogalvanic effect of spin-angular momentum in realistic setups.
[1] H. Ishizuka and M. Sato, Phys. Rev. Lett. 122, 197702 (2019).
[2] H. Ishizuka and M. Sato, Phys. Rev. B 100, 224411 (2019).
*This work is supported in part by JSPS KAKENHI (Numbers: 18H03676, 19K14649, 20H01830) and Grant-in-Aid for Scientific Research on Innovative Areas "Quantum Liquid Crystals" (Grant No. JP19H05825).
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