Mean-field theory for the spin-triplet excition liquid in quantum wells

Using a mean-field theory, we study the possible existence of a spin-triplet intersubband exciton liquid ground state in semiconductor quantum well systems as a function of the electronic density and the strength of the intersubband Coulomb interaction matrix element at low temperatures. We find the...

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Bibliographic Details
Published in:Solid state communications 1995, Vol.96 (4), p.215-219
Main Authors: Radtke, R.J., Das Sarma, S.
Format: Article
Language:English
Subjects:
A. quantum Wells
D. electron-electron interactions
D. phase transitions
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Summary:Using a mean-field theory, we study the possible existence of a spin-triplet intersubband exciton liquid ground state in semiconductor quantum well systems as a function of the electronic density and the strength of the intersubband Coulomb interaction matrix element at low temperatures. We find the excitonic phase to be stable over a large region of parameter space, and our calculated critical temperatures are attainable experimentally. In addition, we find that the transition to the excitonic phase can be either first- or second-order at zero temperature.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(95)00415-7