| Issue |
Europhys. Lett.
Volume 59, Number 4, August 2002
|
|
|---|---|---|
| Page(s) | 586 - 591 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and opticalproperties | |
| DOI | https://doi.org/10.1209/epl/i2002-00144-3 | |
| Published online | 01 August 2002 | |
Quantum diffusion of dipole-oriented indirect excitons in coupled quantum wells
Department of Physics and Astronomy, Cardiff University
Cardiff CF24 3YB, UK
Received:
6
May
2002
Accepted:
14
May
2002
A model for diffusion of statistically degenerate excitons in
(coupled) quantum wells is proposed and analysed. Within a
microscopic approach, we derive a quantum diffusion equation,
calculate and estimate the self-diffusion coefficient for
excitons in quantum wells and derive a modified Einstein relation
adapted to statistically degenerated quasi–two-dimensional
bosons. It is also shown that the dipole-dipole interaction of
indirect excitons effectively screens long-range–correlated
disorder in quantum wells. Numerical calculations are given for
indirect excitons in 
coupled quantum wells.
PACS: 71.35.-y – Excitons and related phenomena / 73.63.Hs – Quantum wells
© EDP Sciences, 2002
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