Valley-Polarized Quantum Transport Generated by Gauge Fields in Graphene

Abstract

We report on the possibility to simultaneously generate in graphene a {\it bulk valley-polarized dissipative transport} and a {\it quantum valley Hall effect} by combining strain-induced gauge fields and real magnetic fields. Such unique phenomenon results from a resonance/anti-resonance effect driven by the superposition/cancellation of superimposed gauge fields which differently affect time reversal symmetry. The onset of a valley-polarized Hall current concomitant to a dissipative valley-polarized current flow in the opposite valley is revealed by a $e^2/h$ Hall conductivity plateau. We employ efficient linear scaling Kubo transport methods combined with a valley projection scheme to access valley-dependent conductivities and show that the results are robust against disorder.

2D Materials (accepted for publication)

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Cited by in corpus (26)

• Valleytronics in merging Dirac cones: All-electric-controlled valley filter, valve and universal reversible logic gate
• Valley Polarization and Inversion in Strained Graphene via Pseudo-Landau Levels, Valley Splitting of Real Landau Levels and Confined States
• Linear Scaling Quantum Transport Methodologies
• Current splitting and valley polarization in elastically deformed graphene
• Valley engineering by strain in Kekulé-distorted graphene
• Origin of nonlocal resistance in multiterminal graphene on hexagonal-boron-nitride: Fermi surface edge currents rather than Fermi sea topological valley currents
• Graphene Quantum Strain Transistors
• Quantum Hall response to time-dependent strain gradients in graphene
• Valley Hall Effect and Non-Local Resistance in Locally Gapped Graphene
• Valley polarization braiding in strained graphene
• Electron dynamics in strained graphene
• Enhanced asymmetric valley scattering by scalar fields in non-uniform out-of-plane deformations in graphene
• Gradient-index electron optics in graphene pn junctions
• Tuning transport properties on graphene multi-terminal structures by mechanical deformations
• Tunable valley Hall effect in gate-defined graphene superlattices
• Phase diagrams and edge-state transitions in graphene with spin-orbit coupling and magnetic and pseudomagnetic fields
• Valley current generation using biased bilayer graphene dots
• Mechanical control of quantum transport in graphene
• Fingerprints of a position-dependent Fermi velocity on scanning tunnelling spectra of strained graphene
• Complex Landau levels and related transport properties in the strained zigzag graphene nanoribbons
• Switching valley filtered current directions in multi-terminal graphene systems
• Weyl Semimetal Path to Valley Filtering in Graphene
• Transport through dynamic pseudo-gauge fields and snake states in a Corbino geometry
• Valley filters, accumulators, and switches induced in graphene quantum dots by lines of adsorbed hydrogen atoms
• Quantum Transport Straintronics and Mechanical Aharonov-Bohm Effect in Quasi-metallic SWCNTs
• Quantized valley Hall response from local bulk density variations