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arXiv 0804.3366cond-mat.mes-hall
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具有自旋轨道相互作用的二维电子气中的各向异性等离子体激元

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

S. M. Badalyan, A. Matos-Abiague, G. Vignale, J. Fabian

摘要:

研究了二维半导体结构中自旋轨道耦合引起的等离子体动力学各向异性。线性Bychkov-Rashba和Dresselhaus自旋轨道相互作用的相互作用极大地影响了等离子体光谱:动力学结构因子在几十年内表现出变化,禁止等离子体在特定方向上传播。虽然这种等离子体滤波使得等离子体动力学中的自旋-轨道耦合的存在是可观察的,但它也为等离子体器件提供了控制工具。值得注意的是,如果两种相互作用的强度相等,不仅各向异性,而且集体响应中线性自旋轨道耦合的所有痕迹都消失了。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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