Experimental results concerning ballistic excitonic transport in high quality cuprite single crystals are presented and discussed. The onset conditions of this anomalous transport, in the form of a packet propagating at near sound velocity, is compatible with theoretical predictions for Bose-Einstein condensation of n = 1 paraexcitons. Experiments involving the interaction between two packets reveal coherence properties, in agreement with an interpretation assuming an exciton Bose-Einstein condensate as the origin of the packet. The amplification of the packet by thermal excitons and the creation of a stationary condensate in the form of a filament are discussed in terms of radiationless exciton scattering induced by the condensate.
| Identifer | oai:union.ndltd.org:uottawa.ca/oai:ruor.uottawa.ca:10393/8595 |
| Date | January 1999 |
| Creators | Benson, Eric. |
| Contributors | Fortin, Emery, |
| Publisher | University of Ottawa (Canada) |
| Source Sets | Université d’Ottawa |
| Detected Language | English |
| Type | Thesis |
| Format | 141 p. |
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