All-strain based valley filter in graphene nanoribbons using snake states

Abstract

A pseudo-magnetic field kink can be realized along a graphene nanoribbon using strain engineering. Electron transport along this kink is governed by snake states that are characterized by a single propagation direction. Those pseudo-magnetic fields point towards opposite directions in the K and K' valleys, leading to valley polarized snake states. In a graphene nanoribbon with armchair edges this effect results in a valley filter that is based only on strain engineering. We discuss how to maximize this valley filtering by adjusting the parameters that define the stress distribution along the graphene ribbon.

arXiv comment8 pages, 6 figures

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• Electron dynamics in strained graphene
• Enhanced asymmetric valley scattering by scalar fields in non-uniform out-of-plane deformations in graphene
• Valley filtering in strain-induced $\alpha$-${\mathcal{T}}_3$ quantum dots
• Effect of zitterbewegung on the propagation of wave packets in ABC-stacked multilayer graphene: an analytical and computational approach
• Electron collimation at van der Waals domain walls in bilayer graphene
• Valley isospin of interface states in a graphene $pn$ junction in the quantum Hall regime
• Electronic and transport properties of anisotropic semiconductor quantum wires
• Switchable valley filter based on a graphene $p$-$n$ junction in a magnetic field
• Emergence of strain-induced moiré patterns and pseudo-magnetic field confined states in graphene
• Effectuating tunable valley selection via multi-terminal monolayer graphene devices
• Origins of Valley Current Reversal in Partially Overlapped Graphene Layers
• Tunnel Valley Current Filter in the Partially Overlapped Graphene under the Vertical Electric Field
• Scalable tight-binding model for strained graphene