Resonant valley filtering of massive Dirac electrons
arXiv:1304.0654 · doi:10.1103/PhysRevB.86.115431
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 similar 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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- Dirac wave transmission in Lévy disordered systems
- Minimal Geometry for Valley Filtering in Graphene
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- Guided modes and terahertz transitions for two-dimensional Dirac fermions in a smooth double-well potential
- Weyl Semimetal Path to Valley Filtering in Graphene
- All-electrical valley filtering in graphene systems (I): A path to integrated electro-valleytronics
- Momentum-space dynamics of Dirac quasiparticles in correlated random potentials: Interplay between dynamical and Berry phases
- Low-energy trions in graphene quantum dots
- All-electrical valley filtering in graphene systems (II): Numerical study of electron transport in valley valves
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