Moldavskaya, M. D. and Golub, L. E. and Danilov, S. N. and Bel'kov, V. V. and Weiss, D. and Ganichev, S. D. (2023) Photocurrents in bulk tellurium. PHYSICAL REVIEW B, 108 (23): 235209. ISSN 2469-9950, 2469-9969
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We report a comprehensive study of polarized infrared/terahertz photocurrents in bulk tellurium crystals. We observe different photocurrent contributions and show that, depending on the experimental conditions, they are caused by the trigonal photogalvanic effect, the transverse linear photon drag effect, and the magnetic field induced linear and circular photogalvanic effects. All observed photocurrents have not been reported before and are well explained by the developed phenomenological and microscopic theory. We show that the effects can be unambiguously distinguished by studying the polarization, magnetic field, and radiation frequency dependence of the photocurrent. At frequencies around 30 THz, the photocurrents are shown to be caused by the direct optical transitions between subbands in the valence band. At lower frequencies of 1 to 3 THz, used in our experiment, these transitions become impossible and the detected photocurrents are caused by the indirect optical transitions (Drude-like radiation absorption).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INTERVALENCE BAND TRANSITIONS; OPTICAL-ACTIVITY; POLARIZATION E; IONIZATION; PRESSURE; SURFACE; FIELD; |
| 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: | 19 Apr 2024 14:36 |
| Last Modified: | 19 Apr 2024 14:36 |
| URI: | https://pred.uni-regensburg.de/id/eprint/61400 |
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