Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-06-03
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 10 figures
Scientific paper
A theory of the separation of a system of indirect excitons into a condensed and a gaseous phases with the formation of regular patterns of alternating phases in inhomogeneous external fields is developed. The theory is applied to the study of the non-uniform distribution of the exciton density in a double quantum well under a slot cut in a metallic electrode. It is shown that in a certain range of exciton generation rates a chain of light emitting islands periodically localized along the slot is developed. By creating a biased external potential along the slot the periodical pattern could be forced to move along the slot. Also the structures of condensed phases distribution arising at periodical external potential is considered.
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