Currents and pseudomagnetic fields in strained graphene rings

Abstract

We study the effects of strain on the electronic properties and persistent current characteristics of a graphene ring using the Dirac representation. For a slightly deformed graphene ring flake, one obtains sizable pseudomagnetic (gauge) fields that may effectively reduce or enhance locally the applied magnetic flux through the ring. Flux-induced persistent currents in a flat ring have full rotational symmetry throughout the structure; in contrast, we show that currents in the presence of a circularly symmetric deformation are strongly inhomogeneous, due to the underlying symmetries of graphene. This result illustrates the inherent competition between the `real' magnetic field and the `pseudo' field arising from strains, and suggest an alternative way to probe the strength and symmetries of pseudomagnetic fields on graphene systems.

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Cited by in corpus (20)

• Novel effects of strains in graphene and other two dimensional materials
• Valley Polarization and Inversion in Strained Graphene via Pseudo-Landau Levels, Valley Splitting of Real Landau Levels and Confined States
• Strained fold assisted transport in graphene systems
• Pseudomagnetic fields and triaxial strain in graphene
• Gaussian deformations in graphene ribbons: flowers and confinement
• Persistent charge and spin currents in the long wavelength regime for graphene rings
• Optical conductivity of curved graphene
• Lorentz force effects for graphene Aharonov-Bohm interferometers
• Straintronics beyond homogeneous deformation
• Tuning transport properties on graphene multi-terminal structures by mechanical deformations
• The Casimir effect for fermionic currents in conical rings with applications to graphene ribbons
• Fano resonances in hexagonal zigzag graphene rings under external magnetic flux
• Suppression of decoherence in a graphene monolayer ring
• Induced fermionic charge and current densities in two-dimensional rings
• Gap engineering in strained fold-like armchair graphene nanoribbons
• Robustness of persistent currents in two-dimensional Dirac systems with disorders
• Aharonov-Bohm conductance oscillations and current equilibration in local n - p junctions in graphene
• Persistent currents in topological and trivial confinement in silicene
• The influence of Gaussian strain on sublattice selectivity of impurities in graphene
• Deformation induced pseudo-magnetic fields in complex carbon architectures