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Temperature dependence of the luminescence from a two-dimensional electron system in the Wigner solid regime

Research output: Contribution to journalJournal article

Published

Journal publication date19/02/1992
JournalSurface Science
Journal number1-3
Volume263
Number of pages5
Pages39-43
Original languageEnglish

Abstract

We have studied the temperature and magnetic field dependence of the luminescence of a two-dimensional electron system in the extreme magnetic quantum limit. Analysis of the intensity variations of the shoulder that appears on the low-energy side of the lowest Landau level luminescence peak, attributed to the formation of a pinned Wigner crystal, has enabled us to construct an electron solid phase diagram. In the fractional quantum Hall regime, we observe clear maxima in the high- and low-energy halfwidths of the luminescence line around fractional occupancies 1/3, 1/5 and 1/7. This behaviour is consistent with a transition between two luminescence lines at the shifts.