2010/08/12 by J. Karch, Karch, J., P. Olbrich +38
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Graphene research and applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Quantum, superfluid, helium dynamics #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1008.2116
4 pages, 5 figures
arxiv created 2010/08/12 · openalex publication_date 2010/08/12 · arxiv updated 2010/08/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 electric and magnetic fields which are however rotating with the light's frequency.