• 文献标题:   Multiple magnetic barriers in graphene
  • 文献类型:   Article
  • 作  者:   DELL ANNA L, DE MARTINO A
  • 作者关键词:   band structure, graphene, magnetic multilayer, magnetic structure, superlattice
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   SISSA ISAS
  • 被引频次:   139
  • DOI:   10.1103/PhysRevB.79.045420
  • 出版年:   2009

▎ 摘  要

We study the behavior of charge carriers in graphene in inhomogeneous perpendicular magnetic fields. We consider two types of one-dimensional magnetic profiles, uniform in one direction: a sequence of N magnetic barriers and a sequence of alternating magnetic barriers and wells. In both cases, we compute the transmission coefficient of the magnetic structure by means of the transfer-matrix formalism and the associated conductance. In the first case the structure becomes increasingly transparent upon increasing N at fixed total magnetic flux. In the second case we find strong wave-vector filtering and resonant effects. We also calculate the band structure of a periodic magnetic superlattice and find a wave-vector-dependent gap around zero energy.