title: Strain-induced pseudomagnetic fields in twisted graphene nanoribbons.
abstract: We present, for the first time, an atomic-level and quantitative study of a strain-induced pseudomagnetic field in graphene nanoribbons with widths of hundreds of nanometers. We show that twisting strongly affects the band structures of graphene nanoribbons with arbitrary chirality and generates well-defined pseudo-Landau levels, which mimics the quantization of massive Dirac fermions in a magnetic field up to 160 T. Electrons are localized either at ribbon edges forming the edge current or at the ribbon center forming the snake orbit current, both being valley polarized. Our result paves the way for the design of new graphene-based nanoelectronics.
authors.affiliation: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, USA and Beijing Computational Science Research Center, Beijing 100084, China.
authors.forename: Dong-Bo
authors.initials: DB
authors.lastname: Zhang
authors.affiliation: Physikalische Chemie, Technische Universität Dresden, D-01062 Dresden, Germany.
authors.forename: Gotthard
authors.initials: G
authors.lastname: Seifert
authors.affiliation: SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Chang