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

被引：3
|
作者：
Yama, M. [1 ]
Matsuo, M. [2 ,3 ,4 ,5 ]
Kato, T. [1 ]
机构：
[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Japan
[2] Univ Chinese Acad Sci, Kavli Inst Theoret Sci, Beijing, Peoples R China
[3] Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Comp, Beijing, Peoples R China
[4] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Japan
[5] RIKEN Ctr Emergent Matter Sci CEMS, Saitama, Japan
来源：
PHYSICAL REVIEW B | 2023年 / 107卷 / 17期
基金：
日本学术振兴会;
关键词：
TO-CHARGE CONVERSION; COEFFICIENTS; TRANSITION; INTERFACE; RESONANCE; MOBILITY; HELIX;
D O I：
10.1103/PhysRevB.107.174414
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页数：15
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