Ordered Dissipative Structures in Exciton Systems in Semiconductor Quantum Wells

Andrey A. Chernyuk, Volodymyr I. Sudakov

Institute for Nuclear Research of NAS of Ukraine, 47 Nauky Ave., Kyiv, 03680 Ukraine

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.

Keywords: dissipative structures; exciton condensation; quantum wells.

MSC: 82C22; 82D37

Received: November 10, 2005; in final form February 8, 2006; Published online February 23, 2006

Language: English

DOI: 10.3842/SIGMA.2006.025

Bibliographic databases:

• 
• 
• 
• 

ArXiv: cond-mat/0508282