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Title
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Resonant valley filtering of massive Dirac electrons
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Author
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Abstract
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| Electrons in graphene, in addition to their spin, have two pseudospin degrees of freedom: sublattice and valley pseudospin. Valleytronics uses the valley degree of freedom as a carrier of information similarly to the way spintronics uses electron spin. We show how a double-barrier structure consisting of electric and vector potentials can be used to filter massive Dirac electrons based on their valley index. We study the resonant transmission through a finite number of barriers and we obtain the energy spectrum of a superlattice consisting of electric and vector potentials. When a mass term is included, the energy bands and energy gaps at the K and K' points are different and they can be tuned by changing the potential. |
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Language
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English
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Source (journal)
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Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
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Publication
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Lancaster, Pa
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2012
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ISSN
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1098-0121
[print]
1550-235X
[online]
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DOI
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10.1103/PHYSREVB.86.115431
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Volume/pages
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86
:11
(2012)
, 12 p.
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Article Reference
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115431
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ISI
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000309173300004
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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