
SIGMA 2 (2006), 025, 9 pages condmat/0508282
https://doi.org/10.3842/SIGMA.2006.025
Ordered Dissipative Structures in Exciton Systems in Semiconductor Quantum Wells
Andrey A. Chernyuk and Volodymyr I. Sugakov
Institute for Nuclear Research of NAS of Ukraine, 47
Nauky Ave., Kyiv, 03680 Ukraine
Received November 10, 2005, in final form February 08, 2006; Published online February 23, 2006
Abstract
A phenomenological theory of exciton condensation in
conditions of inhomogeneous excitation is proposed. The theory is
applied to the study of the development of an exciton luminescence
ring and the ring fragmentation at macroscopical distances from
the central excitation spot in coupled quantum wells. The
transition between the fragmented and the continuous ring is
considered. With assumption of a defect in the structure, a
possibility of a localized island of the condensed phase in a
fixed position is shown. Exciton density distribution is also
analyzed in the case of two spatially separated spots of the laser
excitation.
Key words:
dissipative structures; exciton condensation; quantum wells.
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