Helical scattering and valleytronics in bilayer graphene
arXiv:1007.4594 · doi:10.1103/PhysRevB.82.165409
Abstract
We describe an angularly asymmetric interface-scattering mechanism which allows to spatially separate the electrons in the two low-energy valleys of bilayer graphene. The effect occurs at electrostatically defined interfaces separating regions of different pseudospin polarization, and is associated with the helical winding of the pseudospin vector across the interface, which breaks the reflection symmetry in each valley. Electrons are transmitted with a preferred direction of up to 60 degree over a large energetic range in one of the valleys, and down to -60 degree in the other. In a Y-junction geometry, this can be used to create and detect valley polarization.
6 pages
References in corpus (17)
- Electric Field Effect in Atomically Thin Carbon Films
- The electronic properties of graphene
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Chiral tunneling and the Klein paradox in graphene
- Valley contrasting physics in graphene: magnetic moment and topological transport
- Landau level degeneracy and quantum Hall effect in a graphite bilayer
- Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
- Valley filter and valley valve in graphene
- Quantum interference and Klein tunneling in graphene heterojunctions
- Veselago Lens for Electrons: Focusing and Caustics in Graphene p-n Junctions
- Quantum-limited shot noise in graphene
- Selective transmission of Dirac electrons and ballistic magnetoresistance of \textit{n-p} junctions in graphene
- Topological confinement in bilayer graphene
- Theory of the valley-valve effect in graphene nanoribbons
- Pseudospin valve in bilayer graphene: towards graphene-based pseudospintronics
- Topological confinement in graphene bilayer quantum rings
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- The electronic properties of bilayer graphene
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- Klein Tunneling and Berry Phase in Bilayer Graphene with a Band Gap
- Valley polarized transport in strained graphene based Corbino disc
- Hybrid topological guiding mechanisms for photonic crystal fibers
- Conductance anomaly near the Lifshitz transition in strained bilayer graphene
- Experimental observations of topologically guided water waves within non-hexagonal structures
- Valley filter from magneto-tunneling between single and bi-layer graphene
- Tunable three-way valley Hall energy-splitter: venturing beyond graphene-like structures
- Valley current generation using biased bilayer graphene dots
- Trigonal distortion of topologically confined channels in bilayer Graphene
- Magnetoelectric effect in bilayer graphene controlled by valley-isospin density
- Charge-pseudospin coupled diffusion in semi-Dirac graphene: pseudospin assisted valley transport
- Valley current filtering and reversal by parallel side contacted armchair nanotubes
- Zener tunneling isospin Hall effect in HgTe quantum wells and graphene multilayers
- Origins of Valley Current Reversal in Partially Overlapped Graphene Layers
- Complete Spin and Valley Polarization by Total External Reflection from Potential Barriers in Bilayer Graphene and Monolayer Transition Metal Dichalcogenides
- Tunnel Valley Current Filter in the Partially Overlapped Graphene under the Vertical Electric Field
- Energy symmetry and interlayer wave function ratio of tunneling electrons in partially overlapped graphene
- Acoustic topological circuitry in square and rectangular phononic crystals
- Evanescent-mode-assisted Klein tunneling in dual-gated bilayer graphene