Collective properties of excitons in the presence of a two-dimensional electron gas
In: Solid State Communications, Jg. 150 (2010-05-01), S. 832-835
Online
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Zugriff:
We have studied the collective properties of two-dimensional (2D) excitons immersed within a quantum well which contains 2D excitons and a two-dimensional electron gas (2DEG). We have also analyzed the excitations for a system of 2D dipole excitons with spatially separated electrons and holes in a pair of quantum wells (CQWs) when one of the wells contains a 2DEG. Calculations of the superfluid density and the Kosterlitz-Thouless (K-T) phase transition temperature for the 2DEG-exciton system in a quantum well have shown that the K-T transition temperature increases with increasing exciton density and that it might be possible to have fast long range transport of excitons. The superfluid density and the K-T transition temperature for dipole excitons in CQWs in the presence of a 2DEG in one of the wells increases with increasing inter-well separation.
Comment: 10 pages, 1 figure. accepted by Solid State Communications
Titel: |
Collective properties of excitons in the presence of a two-dimensional electron gas
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Autor/in / Beteiligte Person: | Gumbs, Godfrey ; Berman, Oleg L. ; Folkes, Patrick |
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Zeitschrift: | Solid State Communications, Jg. 150 (2010-05-01), S. 832-835 |
Veröffentlichung: | Elsevier BV, 2010 |
Medientyp: | unknown |
ISSN: | 0038-1098 (print) |
DOI: | 10.1016/j.ssc.2010.02.012 |
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