F. Agulla-Rueda, E. Mendez, 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.
F. Agulla-Rueda, E. Mendez, et al.
Physical Review B
W.I. Wang, E. Mendez, et al.
Journal of Applied Physics
E. Mendez, L. Esaki, et al.
Physical Review B
J. Beerens, G. Grégoris, et al.
Physical Review B