title: Tunable band gap in gold intercalated graphene.
abstract: Quasi free-standing graphene with Dirac fermion behavior has been recently demonstrated through gold intercalated epitaxial graphene. Herein, we investigate the electronic characteristics of gold-intercepted epitaxial graphene under a perpendicularly applied electric field. Evolution of the band structure of intercalated epitaxial graphene as a function of the bias is investigated by means of density-functional theory including interlayer van der Waals interactions. Our results indicate that gold-intercalated epitaxial graphene can lead to tuneable band gap with the applied bias, which is important for future device applications.
authors.affiliation: Department of Physics, Clark Atlanta University, Georgia 30314, USA.
authors.forename: Indra
authors.initials: I
authors.lastname: Sapkota
authors.forename: Michael A
authors.initials: MA
authors.lastname: Roundtree
authors.forename: John H
authors.initials: JH
authors.lastname: Hall
authors.forename: Xiao-Qian
authors.initials: XQ
authors.lastname: Wang