Topological confinement in bilayer graphene

Abstract

We study a new type of one-dimensional chiral states that can be created in bilayer graphene (BLG) by electrostatic lateral confinement. These states appear on the domain walls separating insulating regions experiencing the opposite gating polarity. While the states are similar to conventional solitonic zero-modes, their properties are defined by the unusual chiral BLG quasiparticles, from which they derive. The number of zero-mode branches is fixed by the topological vacuum charge of the insulating BLG state. We discuss how these chiral states can manifest experimentally, and emphasize their relevance for valleytronics.

4 pages, 3 figures

References in corpus (7)

• 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
• Asymmetry gap in the electronic band structure of bilayer graphene
• Electron fractionalization in two-dimensional graphenelike structures
• Aharonov-Bohm effect and broken valley-degeneracy in graphene rings
• Existence and topological stability of Fermi points in multilayered graphene

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