Abstract
Collective excitations of edge state electrons in a quasi-one-dimensional quantum well wire under a large transverse magnetic field at zero temperature are investigated theoretically. The plasmon modes for both intrasubband and intersubband excitations are found at different magnetic field strengths and quasi-1D electron density, in the long wavelength limit. The plasmon dispersion relations, which are all acoustic-like, also show an anisotropy which can be attributed to the applied field and the finite width of the wire. These predictions are amenable to experimental verifications.
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