Strains and pseudo-magnetic fields in circular graphene rings

Abstract

We demonstrate that circular graphene ring under a shear stress displays strong pseudo-magnetic fields. We calculate the pseudo-magnetic field both from continuum elasticity theory as well as molecular dynamics simulations. Stable wrinkles are induced by shear deformations and lead to enhancement of the pseudo-magnetic field. The strong pseudo-magnetic field found here can be observed by imaging graphene flake at the atomic level e.g. through scanning tunneling microscope.

11 pages, 8 figures. (Appendixes A and B are added) To appear in Phys. Rev. B

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• Strain-engineering of graphene's electronic structure beyond continuum elasticity
• Uniformity of the pseudomagnetic field in strained graphene
• Currents and pseudomagnetic fields in strained graphene rings
• Localization and circulating currents in curved graphene devices
• Density functional theory analysis of flexural modes, elastic constants, and corrugations in strained graphene
• Valley polarized transport in strained graphene based Corbino disc
• Electronic ground state properties of strained graphene
• Interaction of Flexural Phonons with Electrons in Graphene: A Generalized Dirac Equation in Corrugated Surfaces
• Electronic structure and layer-resolved transmission of bilayer graphene nanoribbon in the presence of vertical fields
• Interplay between nanometer-scale strain variations and externally applied strain in graphene
• Effect of topological defects and Coulomb charge on the low energy quantum dynamics of gapped graphene
• Valley-dependent transport in strain engineering graphene heterojunctions