Zusammenfassung
We report on the observation of the ratchet effect-generation of direct electric current in response to external terahertz radiation-in bilayer graphene, where inversion symmetry is broken by an asymmetric dual-grating gate potential. As a central result, we demonstrate that at high temperature, T = 150 K, the ratchet current decreases at high frequencies as proportional to 1/omega 2, while at ...
