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

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

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/7663

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Title: Anisotropic plasmons in a two-dimensional electron gas with spin-orbit interaction
Author: Badalyan, S. M.; Matos-Abiague, A.; Vignale, Giovanni, 1957-; Fabian, J.
Keywords: exchange, correlation, dielectric and magnetic response functions
spin polarized transport in semiconductors
Date: 2009-05-07
Publisher: American Physical Society
Citation: Phys. Rev. B 79, 205305 (2009) [5 pages]
Abstract: 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.
URI: http://hdl.handle.net/10355/7663
ISSN: 1098-0121

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