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Nonequilibrium Kinetics of Exciton Wave Packets in Crystals
Author(s) -
Gaididei Yu. B.,
Vakhnenko A. A.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221220128
Subject(s) - exciton , condensed matter physics , phonon , physics , wave packet , redistribution (election) , kinetics , non equilibrium thermodynamics , biexciton , thermostat , energy spectrum , quantum mechanics , thermodynamics , political science , law , politics
The migration in a crystal of spatially inhomogeneous electronic excitations interacting with a phonon thermostat is studied. The evolution of excitons with band widths of the order of the optical phonon energy or greater is shown to be adequately described by a mixed, site‐energy representation. A generalized diffusion equation is obtained with memory essentially dependent on the exciton energy and with an inhomogeneity term, describing the energy redistribution between the exciton band sublevels.