C. Tejedor, J.M. Calleja, et al.
Physical Review B
We have observed a sharp reduction of the photoluminescence linewidth from a two-dimensional exciton system (coupled GaAs/AlGaAs quantum wells), at a certain critical temperature (Tc) and under the influence of an electric field. We attribute this narrowing to a phase transition of the exciton system into an ordered state. The experiments suggest that a coherence length long enough to wash out the effect of the fluctuations, which cause the line broadening, is introduced below Tc. © 1990 The American Physical Society.
C. Tejedor, J.M. Calleja, et al.
Physical Review B
L.L. Chang, E. Mendez, et al.
ICPS Physics of Semiconductors 1984
T.P. Smith III, J.A. Brum, et al.
Physical Review Letters
E. Mendez, F. Agulló-Rueda, et al.
Applied Physics Letters