Spontaneous Coherence Effects in Quantum Dots and Quantum Wells Placed in Microcavities

摘要

The Bose-Einstein condensation temperature T_c for a system of coupled quantum dots in a microcavity was estimated in function of the confining potential steepness, the external magnetic field strength, and the barrier layer width for indirect excitons. The effect of the magnetic field on T_c was found to be nonmonotonic over a certain range of the control parameters. The reason is the presence of two competing mechanisms accompanying the increase of the magnetic field: (a) increase of the magnetoexciton effective mass and (b) increase of the effective confining potential steepness for quantum dots.