1999/03/10 by E. G. Mishchenko
Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Strong Light-Matter Interactions #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.59.14892
published as Phys. Rev. B 59, 14892 (1999). · 4 pages, 3 figures. to appear in Phys. Rev. B 59 (1999)
arxiv created 1999/03/10 · openalex publication_date 1999/06/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The inelastic light scattering in a two-dimensional electron gas is studied theoretically using the Boltzmann equation techniques. Electron-hole excitations produce the Raman spectrum essentially different from the one predicted for the 3D case. In the clean limit it has the form of a strong nonsymmetric resonance due to the square-root singularity at the electron-hole frequency \ensuremathω=vk, while in the opposite dirty limit the usual Lorentzian shape of the cross section is reestablished. The effects of electromagnetic field are considered self-consistently, and the contribution from collective plasmon modes is found. It is shown that unlike 3D metals where plasmon excitations are unobservable (because of very large required transferred frequencies), the two-dimensional electron system gives rise to a low-frequency (\ensuremathω\ensuremath∝k1/2) plasmon peak. A measurement of the width of this peak can provide data on the magnitude of the electron-scattering rate.