Charged and neutral exciton phase formation in the magnetically quantized two-dimensional electron gas

D. Gekhtman, E. Cohen, Arza Ron, L. Pfeiffer

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

We report on a spectroscopic study of the lowest-energy electron-hole transitions of the two-dimensional electron gas (2DEG), with a density varied by photoexcitation in GaAs/(Formula presented)(Formula presented)As quantum wells and under a perpendicularly applied magnetic field B. The transition into the phase consisting of a charged exciton singlet ((Formula presented)) ground state and neutral exciton (X) excited state occurs at a filling factor ν=1. The relative intensities of the (Formula presented) and X transitions measured by photoluminescence excitation at T=2 K, as a function of ν≤1 and of B, are shown to depend on the relative area occupied by the magnetic-field-localized 2DEG and on the reduced orbit of the additional electron bound to (Formula presented).

Original languageEnglish (US)
Pages (from-to)10320-10323
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number15
DOIs
StatePublished - 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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