Suppression of ground-state optical recombination in the quantum Hall regime

M. Dahl*, D. Heiman, A. Pinczuk, B. B. Goldberg, L. N. Pfeiffer, K. W. West

*Corresponding author for this work

Research output: Contribution to journalArticle

38 Scopus citations


The time evolution of optical recombination in the two-dimensional electron gas in GaAs/(Ga,Al)As heterostructures shows an anomalous increase at the Landau-level filling factor =1. Here we find that the radiative recombination rate is slowed by an order of magnitude and is commensurate with the quantum Hall effect. The inhibited electron-hole recombination is caused by localization and changes in the screening response of the electron gas, which leads to reduced electron-hole overlap and broadening of the density of states. These mechanisms are also manifest in a large increase in hole relaxation time at =1.

Original languageEnglish (US)
Pages (from-to)6957-6960
Number of pages4
JournalPhysical Review B
Issue number12
StatePublished - Jan 1 1992

ASJC Scopus subject areas

  • Condensed Matter Physics

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