Karch, J. and Drexler, C. and Olbrich, P. and Fehrenbacher, M. and Hirmer, M. and Glazov, M. M. and Tarasenko, S. A. and Ivchenko, E. L. and Birkner, B. and Eroms, J. and Weiss, D. and Yakimova, R. and Lara-Avila, S. and Kubatkin, S. and Ostler, M. and Seyller, T. and Ganichev, S. D. (2011) Terahertz Radiation Driven Chiral Edge Currents in Graphene. PHYSICAL REVIEW LETTERS, 107 (27): 276601. ISSN 0031-9007, 1079-7114
Full text not available from this repository.Abstract
We observe photocurrents induced in single-layer graphene samples by illumination of the graphene edges with circularly polarized terahertz radiation at normal incidence. The photocurrent flows along the sample edges and forms a vortex. Its winding direction reverses by switching the light helicity from left to right handed. We demonstrate that the photocurrent stems from the sample edges, which reduce the spatial symmetry and result in an asymmetric scattering of carriers driven by the radiation electric field. The developed theory based on Boltzmann's kinetic equation is in a good agreement with the experiment. We show that the edge photocurrents can be applied for determination of the conductivity type and the momentum scattering time of the charge carriers in the graphene edge vicinity.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EPITAXIAL GRAPHENE; DEEP IMPURITIES; SEMICONDUCTORS; IONIZATION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 May 2020 05:05 |
| Last Modified: | 26 May 2020 05:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19667 |
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