Kvon, Z. D. and Dantscher, K. M. and Zoth, C. and Kozlov, D. A. and Mikhailov, N. N. and Dvoretsky, S. A. and Ganichev, S. D. (2014) Terahertz electron transport in a two-dimensional topological insulator in a HgTe quantum well. JETP LETTERS, 99 (5). pp. 290-294. ISSN 0021-3640, 1090-6487
Full text not available from this repository. (Request a copy)Abstract
The terahertz response of a two-dimensional topological insulator in a HgTe quantum well to radiation with wavelengths of 118 and 184 mu m is investigated. It is found that the photoconductivity is rather high (up to a few percent of dark conductivity) and is manifested in both the local and nonlocal responses of the system. This fact proves that the observed photoconductivity is caused by changes in the transport via edge current-carrying states. The sign and nonresonant character of the photoconductivity indicate that it is caused by the heating of electrons in the system. The analysis of experimental results makes it possible to suggest that this heating originates from the Drude absorption of terahertz radiation by metallic "droplets" appearing owing to fluctuations in the impurity potential and the gap and located in direct proximity to edge states.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | STATE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 11 Nov 2019 14:40 |
| Last Modified: | 11 Nov 2019 14:40 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10229 |
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