Pattern Formation in Exciton System near Quantum Degeneracy
| dc.creator | Levitov, L S | |
| dc.creator | Simons, B D | |
| dc.creator | Butov, L V | |
| dc.date | 2005-03-26 | |
| dc.date.accessioned | 2026-07-07T09:31:50Z | |
| dc.date.available | 2026-07-07T09:31:50Z | |
| dc.description | We discuss models of the modulational instability in a cold exciton system in coupled quantum wells. One mechanism involves exciton formation in a photoexcited electron-hole system in the presence of stimulated binding processes which build up near exciton degeneracy. It is shown that such processes may give rise to Turing instability leading to a spatially modulated state. The structure and symmetry of resulting patterns depend on dimensionality and symmetry. In the spatially uniform 2d electron-hole system, the instability leads to a triangular lattice pattern while, at an electron-hole interface, a periodic 1d pattern develops. Wavelength selection mechanism is analyzed, revealing that the transition is abrupt (type I) for the uniform 2d system, and continuous (type II) for the electron-hole interface. Another mechanism that could possibly drive the instability involves long-range attraction of the excitons. We illustrate how such an interaction can result from current induced by exciton recombination ('plasmon wind'), derive stability criterion, and discuss likelihood of such a scenario. | |
| dc.description | 6 pages, 2 figures, proceedings of International Conference on Spontaneous Coherence in Exciton Systems | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0503628 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0503628 | |
| dc.identifier | Solid State Comm., v. 134, p. 51-57 (2005) | |
| dc.identifier | doi:10.1016/j.ssc.2004.11.050 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/158599 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Pattern Formation in Exciton System near Quantum Degeneracy | |
| dc.type | text |