Excitons in dense two-dimensional electron-hole magnetoplasmas

L. V. Butov, V. D. Kulakovskii, G. E.W. Bauer, A. Forchel, D. Grützmacher

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

We report clear excitonic effects in the optical spectra of neutral, dense magnetoplasmas in an In0.53Ga0.47As/InP quantum well at low temperatures. The observed suppression of the density dependence of the uppermost occupied (je=jh=N) Landau-level transition energies in the range of filling factors N<ν/2<N+1 is direct evidence that electrons and holes from the Nth Landau levels bind into magnetoexcitons. The effect disappears with increasing temperature. Good agreement between experimental results and theoretical calculations is obtained by including both the inter-Landau-level coupling and screening effects.

Original languageEnglish
Pages (from-to)12765-12768
Number of pages4
JournalPhysical Review B
Volume46
Issue number19
DOIs
Publication statusPublished - 1992 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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