Reststrahl band-assisted photocurrents in epitaxial grahene layers

URN to cite this document:: urn:nbn:de:bvb:355-epub-308750

Olbrich, Peter ; Drexler, Christoph ; Golub, L. E. ; Danilov, S. N, ; Shalygin, V. A, ; Yakimova, R. ; Lara-Avila, S. ; Kubatkin, S. ; Redlich, B. ; Huber, Rupert ; Ganichev, Sergey

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Date of publication of this fulltext: 15 Oct 2014 11:23

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Abstract

We report on the observation of the reststrahl band-assisted photocurrents in epitaxial graphene on SiC excited by infrared radiation. The peculiar spectral dependence for frequencies lying within the reststrahl band of the SiC substrate provides a direct and noninvasive way to probe the electric field magnitude at atomic distances from the material's surface. Furthermore our results reveal that ...