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VOLUME 103 (2016) | ISSUE 11 | PAGE 804
Edge absorption and circular photogalvanic effect in 2D topological insulator edges
DOI: 10.7868/S0370274X16110102
Abstract
The electron absorption on the edge states and the edge photocurrent of a 2D topological insulator (TI) are studied. We consider the optical transitions within linear edge branches of the energy spectrum. The interaction with impurities is taken into account. The circular polarization is found to produce the edge photocurrent, the direction of which is determined by light polarization and edge orientation.