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

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Plank, Helene ; Durnev, M. V. ; Candussio, Susanne ; Pernul, Johanna ; Dantscher, Kathrin-Maria ; Mönch, Erwin ; Sandner, Andreas ; Eroms, Jonathan ; Weiss, Dieter ; Belkov, Vassilij ; Tarasenko, Sergey ; Ganichev, Sergey
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Date of publication of this fulltext: 28 Feb 2019 09:16


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 ...


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