Exciton correlations in coupled quantum wells and their luminescence blue shift
arXiv:0908.1810 · doi:10.1103/PhysRevB.80.195313
Abstract
In this paper we present a study of an exciton system where electrons and holes are confined in double quantum well structures. The dominating interaction between excitons in such systems is a dipole - dipole repulsion. We show that the tail of this interaction leads to a strong correlation between excitons and substantially affects the behavior of the system. Making use of qualitative arguments and estimates we develop a picture of the exciton - exciton correlations in the whole region of temperature and concentration where excitons exist. It appears that at low concentration degeneracy of the excitons is accompanied with strong multi-particle correlation so that the system cannot be considered as a gas. At high concentration the repulsion suppresses the quantum degeneracy down to temperatures that could be much lower than in a Bose gas with contact interaction. We calculate the blue shift of the exciton luminescence line which is a sensitive tool to observe the exciton - exciton correlations.
27 pages in PDF and DVI format, 8 figures
References in corpus (7)
- Strongly correlated 2D quantum phases with cold polar molecules: controlling the shape of the interaction potential
- Quantum phase transition in a two-dimensional system of dipoles
- Analysis of the exciton-exciton interaction in semiconductor quantum wells
- Coherence Length of Cold Exciton Gases in Coupled Quantum Wells
- Wigner supersolid of excitons in electron-hole bilayers
- Spatial nonlocal pair correlations in a repulsive 1D Bose gas
- Effects of strong correlations for 2D Bose-Einstein condensed dipolar excitons
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