Edge photocurrent driven by terahertz electric field in bilayer graphene
S. Candussio, M. V. Durnev, S. A. Tarasenko, Jun Yin, J. Keil, Yaping Yang, Seok‐Kyun Son, Artem Mishchenko, H. Plank, V. V. Bel’kov, Sergey Slizovskiy, Vladimir I. Fal’ko, Sergey Ganichev
Abstract
Here, the authors report on the observation of edge electric currents excited in bilayer graphene by terahertz laser radiation. The photocurrent's sign and direction are controlled by the radiation polarization state. In the presence of a magnetic field $B$, the photocurrent exhibits 1/$B$-periodic oscillations. The theory developed here shows that the photocurrent is formed in the vicinity of the edge and originates from the alignment of the free charge carrier momenta with dynamic accumulation of charge at the edges where the $P$ symmetry is broken.
Topics & Concepts
PhotocurrentTerahertz radiationElectric fieldGrapheneBilayer graphenePolarization (electrochemistry)Condensed matter physicsOptoelectronicsCharge carrierExcited stateMaterials sciencePhysicsOpticsAtomic physicsNanotechnologyChemistryQuantum mechanicsPhysical chemistryGraphene research and applicationsTopological Materials and PhenomenaMechanical and Optical Resonators