Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1998-11-17
Physics
Condensed Matter
Statistical Mechanics
19 pages, 9 figures. Phys. Rev. B (accepted for publication)
Scientific paper
10.1103/PhysRevB.59.5032
Quasi-equilibrium relaxational thermodynamics is developed to understand LA-phonon-assisted thermalization of Bose-Einstein distributed excitons in quantum wells. We study the quantum-statistical effects in the relaxational dynamics of the effective temperature of excitons $T = T(t)$. When $T$ is less than the degeneracy temperature $T_0$, well-developed Bose-Einstein statistics of quantum well excitons leads to nonexponential and density-dependent thermalization. At low bath temperatures $T_b \to 0$ the thermalization of quantum-statistically degenerate excitons effectively slows down and $T(t) \propto 1 / \ln t$. We also analyze the optical decay of Bose-Einstein distributed excitons in perfect quantum wells and show how nonclassical statistics influences the effective lifetime $\tau_{opt}$. In particular, $\tau_{opt}$ of a strongly degenerate gas of excitons is given by $2 \tau_R$, where $\tau_R$ is the intrinsic radiative lifetime of quasi-two-dimensional excitons. Kinetics of resonant photoluminescence of quantum well excitons during their thermalization is studied within the thermodynamic approach and taking into account Bose-Einstein statistics. We find density-dependent photoluminescence dynamics of statistically degenerate excitons. Numerical modeling of the thermalization and photoluminescence kinetics of quasi-two-dimensional excitons are given for GaAs/AlGaAs quantum wells.
Haug H.
Ivanov A. L.
Littlewood Peter B.
No associations
LandOfFree
Bose-Einstein statistics in thermalization and photoluminescence of quantum well excitons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Bose-Einstein statistics in thermalization and photoluminescence of quantum well excitons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bose-Einstein statistics in thermalization and photoluminescence of quantum well excitons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-187014