Phys. Rev. Lett. 105, 227402 (2010) [4 pages]Dynamic Hall Effect Driven by Circularly Polarized Light in a Graphene LayerReceived 12 August 2010; published 23 November 2010 We report the observation of the circular ac Hall effect where the current is solely driven by the crossed ac electric and magnetic fields of circularly polarized radiation. Illuminating an unbiased monolayer sheet of graphene with circularly polarized terahertz radiation at room temperature generates—under oblique incidence—an electric current perpendicular to the plane of incidence, whose sign is reversed by switching the radiation helicity. Alike the classical dc Hall effect, the voltage is caused by crossed E and B fields which are, however rotating with the light’s frequency. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.105.227402
DOI:
10.1103/PhysRevLett.105.227402
PACS:
78.40.Ri, 72.80.Vp, 73.50.Pz, 78.67.Wj
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