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Uspekhi Fizicheskikh Nauk, 1993, Volume 163, Number 5, Pages 67–114
DOI: https://doi.org/10.3367/UFNr.0163.199305d.0067
(Mi ufn7163)
 

This article is cited in 8 scientific papers (total in 8 papers)

REVIEWS OF TOPICAL PROBLEMS

Light scattering from electron-density fluctuations in multivalley semiconductors and metals

B. Kh. Bairamov, V. A. Voitenko, I. P. Ipatova

Saint-Petersburg State Technical University
Abstract: The theoretical concepts of Raman scattering by free current carriers in semiconductors and metals are reviewed. Various elementary excitations are discussed as the sources of the light-scattering fluctuations: one-particle charge-density fluctuations and plasmons, spin-density fluctuations, and fluctuations of the density of electron energy and momentum. These elementary excitations are common to different solids: metals, semimetals, semiconductors, and superconductors. As an adequate mathematical apparatus that reflects the unitary nature of the Raman spectra of these elementary excitations in various solids, a macroscopic approach to describing their relaxation is proposed. In this approach one distinguishes two mechanisms of relaxation: the diffusion mechanism, in which relaxation occurs via diffusional fluxes of varying nature, and the Mandel'shtam–Leontovich mechanism, in which adiabatic relaxation of the light-scattering fluctuations occurs. In multivalley semiconductors these mechanisms coexist, giving an additive contribution to the reciprocal relaxation time of the fluctuations: in single-valley semiconductors, metals, and superconductors, one of these mechanisms is realized, depending on the details of the electron band structure. Here the correlation function that determines the Raman cross section satisfies the same kinetic or diffusional equation as the fluctuating quantity itself. As technical applications, the possibility is pointed out of contact-free determination of the parameters of the electronic spectrum of semiconductors, metals, semiconductor superlattices, and superconductors.
Received: April 20, 1992
Revised: February 8, 1993
English version:
Physics–Uspekhi, 1993, Volume 36, Issue 5, Pages 392–435
DOI: https://doi.org/10.1070/PU1993v036n05ABEH002181
Document Type: Article
PACS: 78.35.+c, 78.30.-j, 72.20.Jv
Language: Russian
Citation: B. Kh. Bairamov, V. A. Voitenko, I. P. Ipatova, “Light scattering from electron-density fluctuations in multivalley semiconductors and metals”, UFN, 163:5 (1993), 67–114; Phys. Usp., 36:5 (1993), 392–435
Citation in format AMSBIB
\Bibitem{BaiVoiIpa93}
\by B.~Kh.~Bairamov, V.~A.~Voitenko, I.~P.~Ipatova
\paper Light scattering from electron-density fluctuations in multivalley semiconductors and metals
\jour UFN
\yr 1993
\vol 163
\issue 5
\pages 67--114
\mathnet{http://mi.mathnet.ru/ufn7163}
\crossref{https://doi.org/10.3367/UFNr.0163.199305d.0067}
\transl
\jour Phys. Usp.
\yr 1993
\vol 36
\issue 5
\pages 392--435
\crossref{https://doi.org/10.1070/PU1993v036n05ABEH002181}
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  • This publication is cited in the following 8 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
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