Yahniuk, I. and Kozlov, D. A. and Moldavskaya, M. D. and Golub, L. E. and Bel'kov, V. and Dmitriev, I. A. and Krishtopenko, S. S. and Teppe, F. and Ivonyak, Y. and Bercha, A. and Cywinski, C. and Knap, W. and Ganichev, S. D. (2025) Positive terahertz photoconductivity in CdHgTe under hydrostatic pressure. PHYSICAL REVIEW B, 112 (7): 075417. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
Positive terahertz photoconductivity is observed at room temperature in CdHgTe thin films with different Cd contents. We show that electron gas heating caused by Drude-like absorption results in positive photoconductivity because of the interband activation mechanism specific for undoped narrow-gap semiconductors and semimetals. Applying intense terahertz radiation, we observed that the photoconductivity saturates at high intensities, which was found to be caused by absorption bleaching. Both the magnitude of the photoconductivity and the saturation intensity are shown to exhibit an exponential dependence on the hydrostatic pressure. We show that this is a consequence of the fact that both phenomena are controlled by the ratio of energy and momentum relaxation times.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PHOTON-DRAG; PHOTODETECTORS |
| 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: | 15 Jul 2026 08:42 |
| Last Modified: | 15 Jul 2026 08:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66672 |
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