Karch, J. and Olbrich, P. and Schmalzbauer, M. and Zoth, C. and Brinsteiner, C. and Fehrenbacher, M. and Wurstbauer, U. and Glazov, M. M. and Tarasenko, S. A. and Ivchenko, E. L. and Weiss, Dieter and Eroms, Jonathan and Yakimova, R. and Lara-Avila, S. and Kubatkin, S. and Ganichev, S. D.
Dynamic Hall Effect Driven by Circularly Polarized Light in a Graphene Layer.
Phys. Rev. Lett. 105 (22), p. 227402.
Other URL: http://www.physik.uni-regensburg.de/forschung/ganichev/reprints/PRL_2010_105_227402_Dynamic-Hall-Effect-in-Graphene.pdf
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.