Electronic structure of negatively curved graphene

Abstract

We study the electronic structure of graphene in the presence of either sevenfolds or eightfolds by using a gauge field-theory model. The graphene sheet with topological defects is considered as a negative cone surface with infinite Gaussian curvature at the center. The density of electronic states is calculated for a single seven- and eightfold as well as for a pair of sevenfolds with different morphology. The density of states at the Fermi energy is found to be zero in all cases except two sevenfolds with translational factor $M\ne 0$.

To be published in JETP Letters

References in corpus (2)

• Effects of topological defects and local curvature on the electronic properties of planar graphene
• Electronic properties of curved graphene sheets