title: Confinement of massless Dirac fermions in the graphene matrix induced by the B/N heteroatoms.
abstract: In this work, the systems are constructed with the defect lines of B-B or N-N dimers embedded in a graphene matrix using density functional theory. It is found that the Dirac-cone dispersions appear at the Fermi level in the bands introduced by the B or N heteroatom, linear B-B or N-N dimers, demonstrating that the carrier mobility is ∼10(6) m s(-1) which is comparable with that of the pristine graphene. Most importantly, such dimer lines act as the quasi-1-D conducting nanowires whose charge carriers are confined around the linear defects in these dimers while the charge carriers in pristine graphene are dispersed two-dimensionally. Such systems suggest that heteroatoms in graphene can indeed contribute to the Dirac cone. In addition, the type of carriers (p-type or n-type) can be manipulated using the B or N heteroatoms, respectively. This will greatly enrich the electronic properties of Dirac semimetals.
authors.affiliation: Department of Materials Science, College of Materials Science and Engineering, Jilin University, Changchun, 130012, China. yuss@jlu.edu.cn wtzheng@jlu.edu.cn.
authors.forename: Shansheng
authors.initials: S
authors.lastname: Yu
authors.forename: Weitao
authors.initials: W
authors.lastname: Zheng
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Ao
authors.forename: Sean
authors.initials: S
authors.lastname: Li