|
Title
|
|
|
|
Resonant valley filtering of massive Dirac electrons
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| 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. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
| |
|
Publication
|
|
|
|
Lancaster, Pa
:
2012
| |
|
ISSN
|
|
|
|
1098-0121
[print]
1550-235X
[online]
| |
|
Volume/pages
|
|
|
|
86
:11
(2012)
, 12 p.
| |
|
Article Reference
|
|
|
|
115431
| |
|
ISI
|
|
|
|
000309173300004
| |
|
Medium
|
|
|
|
E-only publicatie
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|