Tunneling of Dirac electrons through spatial regions of finite mass

Details Tunneling of Dirac electrons through spatial regions of finite mass Tunneling of Dirac electrons through spatial regions of finite mass

2008-05-14

arxiv.org/abs/0805.2062v1

Journal of Physics: Condensed Matter 20, 325221 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

24 pages, 14 figures

Scientific paper

10.1088/0953-8984/20/32/325221

We study the tunneling of chiral electrons in graphene through a region where the electronic spectrum changes from the usual linear dispersion to a hyperbolic dispersion, due to the presence of a gap. It is shown that contrary to the tunneling through a potential barrier, the transmission of electrons is, in this case, smaller than one for normal incidence. This mechanism may be useful for designing electronic devices made of graphene.

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