• 文献标题:   ELECTRON OPTICS WITH DIRAC FERMIONS: ELECTRON TRANSPORT IN MONOLAYER AND BILAYER GRAPHENE THROUGH MAGNETIC BARRIER AND THEIR SUPERLATTICES
  • 文献类型:   Article
  • 作  者:   AGRAWAL N, GHOSH S, SHARMA M
  • 作者关键词:   graphene monolayer, bilayer, magnetic barrier, optical analogy, band structure modification, klein tunneling, klein reflection, collimation, extra dirac point, gooshanchen shift
  • 出版物名称:   INTERNATIONAL JOURNAL OF MODERN PHYSICS B
  • ISSN:   0217-9792 EI 1793-6578
  • 通讯作者地址:   Indian Inst Technol Delhi
  • 被引频次:   27
  • DOI:   10.1142/S0217979213410038
  • 出版年:   2013

▎ 摘  要

In this review article we discuss the recent progress in studying ballistic transport for charge carriers in graphene through highly inhomogeneous magnetic field known as magnetic barrier in combination with gate voltage induced electrostatic potential. Starting with cases for a single or double magnetic barrier we also review the progress in understanding electron transport through the superlattices created out of such electromagnetic potential barriers and discuss the possibility of experimental realization of such systems. The emphasis is particularly on the analogy of such transport with propagation of light wave through medium with alternating dielectric constant. In that direction we discuss electron analogue of optical phenomena like Fabry-Perot resonances, negative refraction, Goos- Hanchen effect, beam collimation in such systems and explain how such analogy is going to be useful for device generation. The resulting modification of band structure of Dirac fermions, the emergence of additional Dirac points was also discussed accompanied by brief section on the interconvertibility of electric and magnetic field for relativistic Dirac fermions. We also discuss the effect of such electromagnetic potential barrier on bilayer graphene (BLG) in a similar framework.