Effect of vertex corrections on the enhancement of Gilbert damping in spin pumping into a two-dimensional electron gas

We theoretically consider the effect of vertex correction on spin pumping from a ferromagnetic insulator (FI) into a two-dimensional electron gas (2DEG) in which the Rashba and Dresselhaus spin-orbit interactions coexist. The Gilbert damping in the FI is enhanced by elastic spin-flipping or magnon a...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2023-05
Main Authors: Yama, M, Matsuo, M, Kato, T
Format: Article
Language:English
Subjects:
Damping
Electron gas
Electron spin
Ferromagnetism
Pumping
Resonant frequencies
Spin-orbit interactions
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We theoretically consider the effect of vertex correction on spin pumping from a ferromagnetic insulator (FI) into a two-dimensional electron gas (2DEG) in which the Rashba and Dresselhaus spin-orbit interactions coexist. The Gilbert damping in the FI is enhanced by elastic spin-flipping or magnon absorption. We show that the Gilbert damping due to elastic spin-flipping is strongly enhanced by the vertex correction when the ratio of the two spin-orbit interactions is near a special value at which the spin relaxation time diverges while that due to magnon absorption shows only small modification. We also show that the shift in the resonant frequency due to elastic spin-flipping is strongly enhanced in a similar way as the Gilbert damping.
ISSN:2331-8422
DOI:10.48550/arxiv.2201.11498