title: Proximity effect in graphene-topological-insulator heterostructures.
abstract: We formulate a continuum model to study the low-energy electronic structure of heterostructures formed by graphene on a strong three-dimensional topological insulator (TI) for the cases of both commensurate and incommensurate stacking. The incommensurability can be due to a twist angle between graphene and the TI surface or a lattice mismatch between the two systems. We find that the proximity of the TI induces in graphene a strong enhancement of the spin-orbit coupling that can be tuned via the twist angle.
authors.affiliation: Department of Physics, College of William and Mary, Williamsburg, Virginia 23187, USA.
authors.forename: Junhua
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Physics, College of William and Mary, Williamsburg, Virginia 23187, USA.
authors.forename: C
authors.initials: C
authors.lastname: Triola
authors.affiliation: Department of Physics, College of William and Mary, Williamsburg, Virginia 23187, USA.
authors.forename: E
authors.initials: E
authors.lastname: Rossi