Candussio, S. and Bernreuter, S. and Rockinger, T. and Watanabe, K. and Taniguchi, T. and Eroms, J. and Dmitriev, I. A. and Weiss, D. and Ganichev, S. D. (2022) Terahertz radiation induced circular Hall effect in graphene. PHYSICAL REVIEW B, 105 (15): 155416. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We report on the observation of the circular transversal terahertz photoconductivity in monolayer graphene supplied by a back gate. The photoconductivity response is caused by the free carrier absorption and reverses its sign upon switching the radiation helicity. The observed dc Hall effect manifests the time inversion symmetry breaking induced by circularly polarized terahertz radiation in the absence of a magnetic field. For low gate voltages, the photosignal is found to be proportional to the radiation intensity and can be ascribed to the alignment of electron momenta by the combined action of THz and static electric fields as well as by the dynamic heating and cooling of the electron gas. Strikingly, at high gate voltages, we observe that the linear-in-intensity Hall photoconductivity vanishes; the photoresponse at low intensities becomes superlinear and varies with the square of the radiation intensity. We attribute this behavior to the interplay of the second- and fourth-order effects in the radiation electric field which has not been addressed theoretically so far and requires additional studies.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 2-DIMENSIONAL MATERIALS; PHOTOCONDUCTIVITY; PLASMONICS; PHOTONICS; TRANSPORT |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Jonathan Eroms |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Feb 2024 13:10 |
| Last Modified: | 08 Feb 2024 13:10 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57530 |
Actions (login required)
 |
View Item |
