Voegele, X. P. and Schuh, D. and Wegscheider, W. and Kotthaus, J. P. and Holleitner, A. W. (2009) Density Enhanced Diffusion of Dipolar Excitons within a One-Dimensional Channel. PHYSICAL REVIEW LETTERS, 103 (12): 126402. ISSN 0031-9007,
Full text not available from this repository. (Request a copy)Abstract
We experimentally investigate the lateral diffusion of dipolar excitons in coupled quantum wells in two (2D) and one (1D) dimensions. In 2D, the exciton expansion obeys nonlinear temporal dynamics due to the repulsive dipole pressure at a high exciton density, in accordance with recent reports. In contrast, the observed 1D expansion behaves linearly in time even at high exciton densities. The corresponding 1D diffusion coefficient exceeds the one in 2D by far and depends linearly on the exciton density. We attribute the findings to screening of quantum well disorder by the dipolar excitons.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COUPLED QUANTUM-WELLS; POTENTIAL TRAPS; ELECTRIC-FIELD; TRANSPORT; SEMICONDUCTOR; CONFINEMENT; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Sep 2020 06:24 |
| Last Modified: | 07 Sep 2020 06:24 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28393 |
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