Anisotropic plasmons in a two-dimensional electron gas with spin-orbit interaction

被引：65

作者：

Badalyan, S. M. ^{[1
,2
]}

Matos-Abiague, A. ^{[2
]}

Vignale, G. ^{[3
]}

Fabian, J. ^{[2
]}

机构：

[1] Yerevan State Univ, Dept Radiophys, Yerevan 375025, Armenia

[2] Univ Regensburg, Dept Phys, D-93040 Regensburg, Germany

[3] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 20期

关键词：

plasmons; semiconductor heterojunctions; spin-orbit interactions; two-dimensional electron gas; SEMICONDUCTORS; SPINTRONICS; RELAXATION;

D O I：

10.1103/PhysRevB.79.205305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin-orbit coupling-induced anisotropies of plasmon dynamics are investigated in two-dimensional semiconductor structures. The interplay of the linear Bychkov-Rashba and Dresselhaus spin-orbit interactions drastically affects the plasmon spectrum: the dynamical structure factor exhibits variations over several decades, prohibiting plasmon propagation in specific directions. While this plasmon filtering makes the presence of spin-orbit coupling in plasmon dynamics observable, it also offers a control tool for plasmonic devices. Remarkably, if the strengths of the two interactions are equal, not only the anisotropy but all the traces of the linear spin-orbit coupling in the collective response disappear.

引用

页数：5

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