Phase velocity of drifting spin wave packets in semiconductor two-dimensional electron gas

被引：4

作者：

Tanaka, Yusuke ^{[1
]}

Kunihashi, Yoji ^{[1
]}

Sanada, Haruki ^{[1
]}

Gotoh, Hideki ^{[1
]}

Onomitsu, Koji ^{[1
]}

Kohda, Makoto ^{[2
]}

Nitta, Junsaku ^{[2
]}

Sogawa, Tetsuomi ^{[1
]}

机构：

[1] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[2] Tohoku Univ, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

来源：

APPLIED PHYSICS EXPRESS | 2019年 / 12卷 / 01期

基金：

日本学术振兴会;

关键词：

MANIPULATION; COHERENCE; TRANSPORT;

D O I：

10.7567/1882-0786/aaf170

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the drift and diffusion dynamics of spin wave packets under spin-orbit effective magnetic fields in two-dimensional electron systems. A simplified model with a spin drift-diffusion equation predicted that the spin phase velocity will change over time from a large negative value to a small positive value. Kerr rotation microscopy revealed the trend we expected for the phase velocity in spin wave packets in a GaAs quantum well. Monte-Carlo simulations agreed with the experiment and showed that the phase velocity can be simply characterized by the spin- orbit parameters and the size ratio between the instantaneous and initial wave packets. (C) 2018 The Japan Society of Applied Physics

引用

页数：5

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