alexa Electron transport and Goos-Hänchen shift in graphene with electric and magnetic barriers: optical analogy and band structure.
Physics

Physics

Journal of Lasers, Optics & Photonics

Author(s): Sharma M, Ghosh S

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Abstract Transport of massless Dirac fermions in graphene monolayers is analysed in the presence of a combination of singular magnetic barriers and applied electrostatic potential. Extending a recently proposed (Ghosh and Sharma 2009 J. Phys.: Condens. Matter 21 292204) analogy between the transmission of light through a medium with modulated refractive index and electron transmission in graphene through singular magnetic barriers to the present case, we find the addition of a scalar potential profoundly changes the transmission. We calculate the quantum version of the Goos-Hänchen shift that the electron wave suffers upon being totally reflected by such barriers. The combined electric and magnetic barriers substantially modify the band structure near the Dirac point. This affects transport near the Dirac point significantly and has important consequences for graphene-based electronics. This article was published in J Phys Condens Matter and referenced in Journal of Lasers, Optics & Photonics

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