| Autor: |
Jiang, Chongyun, Shalygin, V. A., Panevin, V. Yu., Danilov, S. N., Glazov, M. M., Yakimova, R., Lara-Avila, S., Kubatkin, S., Ganichev, S. D. |
| Rok vydání: |
2011 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.84.125429 |
| Popis: |
We report the study of the helicity driven photocurrents in graphene excited by mid-infrared light of a CO$_2$-laser. Illuminating an unbiased monolayer sheet of graphene with circularly polarized radiation generates -- under oblique incidence -- an electric current perpendicular to the plane of incidence, whose sign is reversed by switching the radiation helicity. We show that the current is caused by the interplay of the circular $ac$ Hall effect and the circular photogalvanic effect. Studying the frequency dependence of the current in graphene layers grown on the SiC substrate we observe that the current exhibits a resonance at frequencies matching the longitudinal optical phonon in SiC. |
| Databáze: |
arXiv |
| Externí odkaz: |
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