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Title
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Bilayer graphene with single and multiple electrostatic barriers: band structure and transmission
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Author
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Abstract
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| We evaluate the electronic transmission and conductance in bilayer graphene through a finite number of potential barriers. Further, we evaluate the dispersion relation in a bilayer graphene superlattice with a periodic potential applied to both layers. As a model we use the tight-binding Hamiltonian in the continuum approximation. For zero bias the dispersion relation shows a finite gap for carriers with zero momentum in the direction parallel to the barriers. This is in contrast to single-layer graphene where no such gap was found. A gap also appears for a finite bias. Numerical results for the energy spectrum, conductance, and the density of states are presented and contrasted with those pertaining to single-layer graphene. |
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Language
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English
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Source (journal)
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Physical review : B : solid state. - Lancaster, Pa, 1970 - 1978
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Publication
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Lancaster, Pa
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2009
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ISSN
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0556-2805
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DOI
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10.1103/PHYSREVB.79.155402
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Volume/pages
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79
:15
(2009)
, p. 155402,1-155402,8
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ISI
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000265944200091
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Full text (Publisher's DOI)
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Full text (open access)
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