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Coherent interactions between phonons and exciton or exciton-polariton condensates

By D. V. Vishnevsky, N. A. Gippius, I. A. Shelykh, D. D. Solnyshkov and G. Malpuech

Abstract

We analyse the interaction of exciton and exciton-polariton condensates in semiconductor microcavity with a coherent acoustic wave. An analytical solution for the dispersion of excitations of coupled condensate-phonon system is found in the approximation of k-independent interactions. Accounting for k-dependence results in a stronger modification of the dispersion, and even in the appearance of the "roton instability" region

Topics: Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics
Year: 2011
DOI identifier: 10.1103/PhysRevB.84.035312
OAI identifier: oai:arXiv.org:1103.2003
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