Interacting intersubband excitations in parabolic semiconductor quantum wells.
作者： I. K. Marmorkos , S. Das Sarma
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摘要: We calculate the finite wave-vector intersubband collective excitation spectra in wide parabolic wells at low two-dimensional electron densities where only lowest quantum subband is occupied by electrons. use a self-consistent time-dependent local-density approximation to linear response of system, comparing our density-functional results with noninteracting Hartree estimate magnitudes exchange-correlation corrections collectivemode dispersion. predict qualitatively new phenomenon where, presence effects, it becomes possible for charge-density (i.e., plasmon mode) lie below quasiparticle continuum
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