Optical Anomalies of the Two-Dimensional Electron Gas in the Extreme Magnetic Quantum Limit

D. Heiman*, B. B. Goldberg, A. Pinczuk, C. W. Tu, A. C. Gossard, J. H. English

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

132 Scopus citations

Abstract

Band-gap optical recombination from the two-dimensional electron gas in GaAs-(Al,Ga)As quantum wells was measured in the regime of the fractional quantum Hall effect. New intrinsic emission lines emerge at the Landau-level filling factor ±1 and at ±<0.8. The anomaly near ±=1 is associated with changes in population of the lowest spin-split Landau level. The spectral doublet observed near ±=23 has a striking temperature dependence below T=2 K similar to the magnetoresistance ±xx associated with the many-body quantum fluid.

Original languageEnglish (US)
Pages (from-to)605-608
Number of pages4
JournalPhysical review letters
Volume61
Issue number5
DOIs
StatePublished - Jan 1 1988

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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