Valley polarization braiding in strained graphene

Abstract

Previous works on deformed graphene predict the existence of valley-polarized states, however, optimal conditions for their detection remain challenging. We show that in the quantum Hall regime, edge-like states in strained regions can be isolated in energy within Landau gaps. We identify precise conditions for new conducting edges-like states to be valley polarized, with the flexibility of positioning them at chosen locations in the system. A map of local density of states as a function of energy and position reveals a unique braid pattern that serves as a fingerprint to identify valley polarization.

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Cited by in corpus (9)

• Light-Induced Valleytronics in Pristine Graphene
• Controlling Valley-Polarisation in Graphene via Tailored Light Pulses
• Effective magnetic field induced by inhomogeneous Fermi velocity in strained honeycomb structures
• Graphene nanodrums as valleytronic devices
• Strongly Absorbing Nanoscale Infrared Domains within Graphene Bubbles
• Emergence of strain-induced moiré patterns and pseudo-magnetic field confined states in graphene
• Switching valley filtered current directions in multi-terminal graphene systems
• Graphene valley polarization as a function of carrier-envelope phase in few-cycle laser pulses and its footprints in harmonic signals
• Creation and control of valley currents in graphene by few cycle light pulses