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Edge currents driven by terahertz radiation in graphene in quantum Hall regime

Edge currents driven by terahertz radiation in graphene in quantum Hall regime We observe that the illumination of unbiased graphene in the quantum Hall regime with polarized terahertz laser radiation results in a direct edge current. This photocurrent is caused by an imbalance of persistent edge currents, which are driven out of thermal equilibrium by indirect transitions within the chiral edge channel. The direction of the edge photocurrent is determined by the polarity of the external magnetic field, while its magnitude depends on the radiation polarization. The microscopic theory developed in this paper describes well the experimental data. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png 2D Materials IOP Publishing

Edge currents driven by terahertz radiation in graphene in quantum Hall regime

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References (42)

Copyright
Copyright © 2018 IOP Publishing Ltd
eISSN
2053-1583
DOI
10.1088/2053-1583/aae39c
Publisher site
See Article on Publisher Site

Abstract

We observe that the illumination of unbiased graphene in the quantum Hall regime with polarized terahertz laser radiation results in a direct edge current. This photocurrent is caused by an imbalance of persistent edge currents, which are driven out of thermal equilibrium by indirect transitions within the chiral edge channel. The direction of the edge photocurrent is determined by the polarity of the external magnetic field, while its magnitude depends on the radiation polarization. The microscopic theory developed in this paper describes well the experimental data.

Journal

2D MaterialsIOP Publishing

Published: Jan 1, 2019

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