ELLIS, M K and Hayne, Manus and USHER, A and PLAUT, A S and PLOOG, K (1992) Magneto-optical determination of the electron-solid phase-boundary. Physical Review B, 45 (23). pp. 13765-13768. ISSN 0163-1829
We have obtained a two-dimensional electron-solid phase diagram in the extreme magnetic quantum limit by studying the temperature dependence of the radiative recombination of electrons in a GaAs/AlxGa1-xAs heterojunction with holes bound to a delta-layer, 250 A away in the GaAs, of Be acceptors. The low-energy shoulder to the luminescence line, indicating the presence of the electron solid, is seen to disappear at a filling-factor-dependent critical temperature. We observe no shoulder above a filling factor of 0.25, and the critical temperature falls to below 0.4 K at filling factors 1/5 and 1/7.
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