Quantum diffusion of dipole-oriented indirect excitons in coupled quantum wells
Statistical Mechanics
2009-11-07 v1
Abstract
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 GaAs/AlGaAs coupled quantum wells.
Cite
@article{arxiv.cond-mat/0206459,
title = {Quantum diffusion of dipole-oriented indirect excitons in coupled quantum wells},
author = {A. L. Ivanov},
journal= {arXiv preprint arXiv:cond-mat/0206459},
year = {2009}
}
Comments
To appear in Europhysics Letters