Topological states in two-dimensional hexagon lattice bilayers

Zhang, Mingming; Xu, Lei; Zhang, Jun

doi:10.1016/j.physleta.2016.05.039

Cited by 2 publications

(1 citation statement)

References 49 publications

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“…Furthermore, the edge band intersects the Fermi level E F indicated by the blue dashed line twice-one with a positive group velocity and the other with a negative group velocity, as depicted in figure 2(b). A single-boundary QVH phase [26] is induced corresponding to a two-terminal conductance G = e 2 /h. Now, we apply an asymmetry boundary potential…”

Section: Band Structure and Transportmentioning

confidence: 99%

Valley-filtered edge states and quantum valley Hall effect in gated bilayer graphene

Zhang

2017

J. Phys.: Condens. Matter

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Electron edge states in gated bilayer graphene in the quantum valley Hall (QVH) effect regime can carry both charge and valley currents. We show that an interlayer potential splits the zero-energy level and opens a bulk gap, yielding counter-propagating edge modes with different valleys. A rich variety of valley current states can be obtained by tuning the applied boundary potential and lead to the QVH effect, as well as to the unbalanced QVH effect. A method to individually manipulate the edge states by the boundary potentials is proposed.

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Section: Band Structure and Transportmentioning

confidence: 99%

Valley-filtered edge states and quantum valley Hall effect in gated bilayer graphene

Zhang

2017

J. Phys.: Condens. Matter

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Electronic structure and transport properties of graphene/h-BN controlled by boundary potential and magnetic field

Sun

Zhang

2020

Mod. Phys. Lett. B

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We study the band structure of the lattice-matched graphene/[Formula: see text]-BN bilayer system in the most stable configuration. An effective way to individually manipulate the edge state by the boundary potentials is proposed. It is shown that the boundary potential can not only shift and deform the edge bands, but also modify the energy gap. We also explore the transport properties of graphene/[Formula: see text]-BN under a magnetic field. The boundary potential can change the distribution of the edge states, resulting in an interesting evolution of the quantized conductance.

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Topological states in two-dimensional hexagon lattice bilayers

Cited by 2 publications

References 49 publications

Valley-filtered edge states and quantum valley Hall effect in gated bilayer graphene

Valley-filtered edge states and quantum valley Hall effect in gated bilayer graphene

Electronic structure and transport properties of graphene/h-BN controlled by boundary potential and magnetic field

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