Magnetoexciton luminescence at 1/3 Landau filling as a function of electron-hole separation

F. Plentz, D. Heiman, A. Pinczuk, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The luminescence spectrum of magnetoexcitons in a 2D electron system in GaAs/AlGaAs is studied as a function of electron-hole separation, h, which is varied by applying front- and back-gate voltages. For Landau filling ν < 1 the energy splitting between the doublet components decreases for increasing h. For ν = 1/3 two regimes are observed - at small h the upper component has a positive-going cusp, while for larger h a positive-going step is observed. This may be related to charge fractionalization associated with anion excitons consisting of three quasi-electrons and a valence band hole.

Original languageEnglish (US)
Pages (from-to)30-33
Number of pages4
JournalSurface Science
Volume361-362
DOIs
StatePublished - Jul 20 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Keywords

  • Contacts
  • Field effect
  • Gallium arsenide
  • Hall effect
  • Luminescence
  • Many body and quasi-particle theories
  • Photoluminescence
  • Quantum wells

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