Transport equations and spin-charge propagating mode in a strongly confined two-dimensional hole gas

被引：9
|
作者：
Hughes, Taylor L. [1 ]
Bazaliy, Yaroslaw B.
Bernevig, B. Andrei
机构：
[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[2] IBM Corp, Stanford Spintron Sci & Applicat Ctr, San Jose, CA 95120 USA
[3] IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA
来源：
PHYSICAL REVIEW B | 2006年 / 74卷 / 19期
关键词：
D O I：
10.1103/PhysRevB.74.193316
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We find that the spin-charge motion in a strongly confined two-dimensional hole gas (2DHG) supports a propagating mode of cubic dispersion apart from the diffusive mode due to momentum scattering. Propagating modes seem to be a generic property of systems with spin-orbit coupling. Through a rigorous Keldysh approach, we obtain the transport equations for the 2DHG, we analyze the behavior of the hole spin relaxation time, the diffusion coefficients, and the spin-charge coupled motion.
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页数：4
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