Spatial Spreading of the Condensate of Magnetoexcitons in a Quantum Hall Insulator
| Autor: | A. V. Gorbunov, A. V. Larionov, L. V. Kulik, V. B. Timofeev |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | JETP Letters. 116:779-784 |
| ISSN: | 1090-6487 0021-3640 |
| Popis: | The spatial spreading of a dense ensemble of spin cyclotron magnetoexcitons in a quantum Hall insulator at the filling factor ν = 2 is visualized using an optical system with a high aperture ratio. It is found that nondiffusive propagation over macroscopic distances is characteristic not only of excitons with a momentum on the order of the reciprocal magnetic length, which form a coherent condensate of magnetoexcitons, but also of excitons with very low momenta. The nondiffusive propagation of magnetoexciton condensates in real space is accompanied by a huge threshold increase in the amplitude of light reflection from excitations. The possible explanations of the observed behavior are discussed. |
| Databáze: | OpenAIRE |
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