Reverse strain-induced snake states in graphene nanoribbons

Abstract

Strain can tailor the band structures and properties of graphene nanoribbons (GNRs) with the well-known emergent pseudo-magnetic fields and the corresponding pseudo-Landau levels (pLLs). We design one type of the zigzag GNR (ZGNR) with reverse strains, producing pseudo-magnetic fields with opposite signs in the lower and upper half planes. Therefore, electrons propagate along the interface as "snake states", experiencing opposite Lorentz forces as they cross the zero field border line. By using the Landauer-Buttiker formalism combined with the nonequilibrium Green's function method, the existence and robustness of the reverse strain-induced snake states are further studied. Furthermore, the realization of long-thought pure valley currents in monolayer graphene systems is also proposed in our device.

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References in corpus (18)

• The electronic properties of graphene
• The structure of suspended graphene sheets
• Valley filter and valley valve in graphene
• A tight-binding approach to uniaxial strain in graphene
• Detecting Topological Currents in Graphene Superlattices
• Nonlinear elasticity of monolayer graphene
• Conductance quantization and transport gap in disordered graphene nanoribbons
• Symmetry-based approach to electron-phonon interactions in graphene
• Generation of pure bulk valley current in graphene
• Disorder-induced enhancement of transport through graphene p-n junctions
• Peculiar Nature of Snake States in Graphene
• Nonlinear valley and spin currents from Fermi pocket anisotropy in 2D crystals
• Conductance quantization and snake states in graphene magnetic waveguides
• Universal spin-Hall conductance fluctuations in two dimensions
• Pseudomagnetic Fields in a Locally Strained Graphene Drumhead
• Magnon Landau levels in the strained antiferromagnetic honeycomb nanoribbons
• Transport through dynamic pseudo-gauge fields and snake states in a Corbino geometry
• Helical superconducting edge modes from pseudo-Landau levels in graphene

Cited by in corpus (4)

• Complex Landau levels and related transport properties in the strained zigzag graphene nanoribbons
• Absence of edge states at armchair edges in inhomogeneously strained graphene under a pseudomagnetic field
• Optical Snake States in Photonic Graphene
• Scalable tight-binding model for strained graphene