Model of fragmentation of the exciton inner ring in semiconductor quantum wells
arXiv:1609.00202 · doi:10.1103/PhysRevB.90.205308
Abstract
The appearance of the non-homogeneous structures of the indirect exciton density distribution in the region of the quantum well (in the region of the inner ring) is explained. The structure (the fragmentation) occurs due to the exciton condensed phase formation because of interaction between excitons. The formation of the structure is related with the non-equalibrity of the system, which is caused by the exciton finite lifetime and the presence of the pumpimg. The structure emerges in the shape of a set of islands or circles of the condensed phase. The structure type depends on the pumping intensity, the size of the laser spot and disappears with increasing the temperature. The merging of two structures, created by different laser spots, is investigated at decreasing the distance between the centers of the spots.
8 pages, 5 figures
References in corpus (8)
- Analysis of the exciton-exciton interaction in semiconductor quantum wells
- Coherence Length of Cold Exciton Gases in Coupled Quantum Wells
- Localization-Delocalization Transition of Indirect Excitons in Lateral Electrostatic Lattices
- Exciton and biexciton energies in bilayer systems
- Biexcitons in two-dimensional systems with spatially separated electrons and holes
- Pattern formation of indirect excitons in coupled quantum wells
- Effect of spatial resolution on the estimates of the coherence length of excitons in quantum wells
- Exciton condensation in quantum wells. Exciton hydrodynamics. The effect of localized states