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Magnetic quantum ratchet effect in graphene

Drexler, C. ; Tarasenko, Sergey ; Olbrich, P. ; Karch, J. ; Hirmer, M. ; Müller, F. ; Gmitra, Martin ; Fabian, Jaroslav ; Yakimova, R. ; Lara-Avila, S. ; Kubatkin, S. ; Wang, M. ; Vajtai, R. ; Ajayan, P. M. ; Kono, J. ; Ganichev, Sergey


A periodically driven system with spatial asymmetry can exhibit a directed motion facilitated by thermal or quantum fluctuations. This so-called ratchet effect has fascinating ramifications in engineering and natural sciences. Graphene is nominally a symmetric system. Driven by a periodic electric field, no directed electric current should flow. However, if the graphene has lost its spatial ...


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