PHASE-TRANSITION IN A 2-DIMENSIONAL DIPOLE-ORIENTED EXCITON SYSTEM

Authors
FUKUZAWA T KIM SY GUSTAFSON TK HALLER EE YAMADA E
Citation
T. Fukuzawa et al., PHASE-TRANSITION IN A 2-DIMENSIONAL DIPOLE-ORIENTED EXCITON SYSTEM, Superlattices and microstructures, 23(1), 1998, pp. 103-106
Citations number
15
Categorie Soggetti
Physics, Condensed Matter
Journal title
Superlattices and microstructures → ACNP
ISSN journal
07496036
Volume
23
Issue
1
Year of publication
1998
Pages
103 - 106
Database
ISI
SICI code
0749-6036(1998)23:1<103:PIA2DE>2.0.ZU;2-E
Abstract
A dipole-oriented two-dimensional exciton system in electrically biase d GaAs/AlGaAs coupled quantum wells has been studied through photolumi nescence. The system has a sample-dependent built-in random potential which traps excitons at low temperature. The average photoluminescence photon energy shows a sudden reduction when the excitation intensity exceeds a critical value at low temperatures. This suggests a phase tr ansition from a Bose glass to superfluid phase. (C) 1998 Academic Pres s Limited.