Publication
Physical Review B
Paper

Strong intermediate-state effects in exciton-mediated electronic intrasubband scattering in multiple-quantum-well structures

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Abstract

Electronic intrasubband excitations are studied by means of resonant inelastic light scattering by a two-dimensional electron gas. The different effect of sharp excitonic intermediate states on depolarized and polarized scattering gives direct evidence for the collective behavior of the spin-density excitation in contrast to the band of single-particle excitations. The observed spin-density energy (0.9 meV) is at significantly lower energy than the single-particle energy (1.1 meV). This is due to the Coulomb exchange interaction in the electron gas. © 1990 The American Physical Society.

Date

15 Dec 1990

Publication

Physical Review B

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