2020/05/31 by S. Candussio, M. V. Durnev, S. A. Tarasenko +18
Chemistry · Materials Science · Physics and Astronomy · #Atomic physics #Bilayer graphene #Charge carrier #Chemistry #Condensed matter physics #Electric field #Excited state #Graphene #Graphene research and applications #Materials science #Mechanical and Optical Resonators #Nanotechnology #Optics #Optoelectronics #Photocurrent #Physics #Polarization (electrochemistry) #Terahertz radiation #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.102.045406
arxiv created 2020/06/15 · openalex publication_date 2020/07/06 · arxiv updated 2020/07/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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.