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• W1997193614 abstract "We report on the theoretical investigation of plasmon excitations in a quasi-two-dimensional electron gas (2DEG) in the presence of a perpendicular magnetic field and spin-orbit interaction induced by the Rashba effect. We derive and discuss the dispersion relations for charge-density excitations within the framework of Bohm-Pines' random-phase approximation. The magnetoplasmons in a 2DEG are known to be characterized by two important properties: (i) the oscillatory behavior of the dispersion curves in the short wavelength limit (SWL) and (ii) the resonance splitting at the frequency $ensuremath{omega}=n{ensuremath{omega}}_{c}$ in the long wavelength limit (LWL); $nphantom{rule{0.2em}{0ex}}(ensuremath{geqslant}2)$ being an integer and ${ensuremath{omega}}_{c}$ the cyclotron frequency. Here we study the effect of the Rashba spin-orbit interactions (SOIs) on these characteristics in depth. We observe that the SOI modifies drastically both the oscillatory behavior in the SWL and yields multiple resonance splittings [at $ensuremath{omega}=(nifmmodepmelsetextpmfi{}{x}_{0}){ensuremath{omega}}_{c}$] in the LWL. Such resonance splittings make the spintronic systems potential candidates for quantum-well-based new devices as spin filters. We discuss the dependence of the magnetoplasmon energy on the propagation vector, the magnetic field, the 2D charge-density, and the Rashba parameter characterizing the SOI." @default.
• W1997193614 created "2016-06-24" @default.
• W1997193614 creator A5031346540 @default.
• W1997193614 date "2006-07-11" @default.
• W1997193614 modified "2023-10-06" @default.
• W1997193614 title "Magnetoplasmon excitations in quasi-two-dimensional Rashba spintronic systems: Oscillations, resonances, and energy gaps" @default.
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• W1997193614 doi "https://doi.org/10.1103/physrevb.74.045304" @default.
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