Ordered Dissipative Structures in Exciton Systems in Semiconductor Quantum Wells

Details Ordered Dissipative Structures in Exciton Systems in Semiconductor Quantum Wells Ordered Dissipative Structures in Exciton Systems in Semiconductor Quantum Wells

2005-08-11

arxiv.org/abs/cond-mat/0508282v2

SIGMA 2 (2006), 025, 9 pages

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/

Scientific paper

10.1103/PhysRevB.74.085303

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.

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