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Photogalvanic probing of helical edge channels in two-dimensional HgTe topological insulators

Dantscher, Kathirn-Maria, Kozlov, D. A., Scherr, M. T., Gebert, Sebastian, Bärenfänger, Jan, Durnev, M. V., Tarasenko, Sergey, Belkov, Vassilij, Mikhailov, N. N., Dvoretsky, S. A., Kvon, Z. D., Ziegler, Johannes, Weiss, Dieter and Ganichev, Sergey (2017) Photogalvanic probing of helical edge channels in two-dimensional HgTe topological insulators. Physical Review B (PRB) 95 (20), pp. 2011031-2011035.

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Abstract

We report on the observation of a circular photogalvanic current excited by terahertz laser radiation in helical edge channels of two-dimensional (2D) HgTe topological insulators (TIs). The direction of the photocurrent reverses by switching the radiation polarization from a right-handed to a left-handed one and, for fixed photon helicity, is opposite for the opposite edges. The photocurrent is ...

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Item type:Article
Date:8 May 2017
Institutions: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
Identification Number:
ValueType
10.1103/PhysRevB.95.201103DOI
Keywords:QUANTUM-WELLS; CURRENTS; STATE;
Dewey Decimal Classification:500 Science > 530 Physics
Status:Published
Refereed:Yes, this version has been refereed
Created at the University of Regensburg:Yes
Item ID:35764
Owner only: item control page

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