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Condensation and pattern formation in cold exciton gases
Author(s) -
Butov L. V.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200303150
Subject(s) - exciton , bose–einstein condensate , condensation , degenerate energy levels , bose gas , scattering , condensed matter physics , biexciton , physics , quantum well , materials science , quantum mechanics , thermodynamics , laser
Excitons are Bose particles with small mass. Exciton Bose–Einstein condensation is expected to occur at a few degrees Kelvin. Experimentally, an exciton temperature well below 1 Kelvin is achieved in coupled quantum wells (CQWs). In this contribution, we review briefly experiments that show a strong enhancement of the exciton scattering rate with increasing exciton concentration revealing bosonic stimulation of exciton scattering, which is a signature of a degenerate Bose‐gas of excitons. Novel experiments with exciton condensation in potential traps, pattern formation in exciton system and macroscopically ordered exciton state are also reviewed briefly.