title: A new Dirac cone material: a graphene-like Be3C2monolayer.
abstract: Two-dimensional (2D) materials with Dirac cones exhibit rich physics and many intriguing properties, but the search for new 2D Dirac materials is still a current hotspot. Using the global particle-swarm optimization method and density functional theory, we predict a new stable graphene-like 2D Dirac material: a Be3C2monolayer with a hexagonal honeycomb structure. The Dirac point occurs exactly at the Fermi level and arises from the merging of the hybridized pzbands of Be and C atoms. Most interestingly, this monolayer exhibits a high Fermi velocity in the same order of graphene. Moreover, the Dirac cone is very robust and retains even included spin-orbit coupling or external strain. These outstanding properties render the Be3C2monolayer a promising 2D material for special electronics applications.
authors.affiliation: School of Physics, Southeast University, Nanjing 211189, P. R. China. jlwang@seu.edu.cn siesta@seu.edu.cn.
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.forename: Shijun
authors.initials: S
authors.lastname: Yuan
authors.forename: Yunhai
authors.initials: Y
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Shi
authors.forename: Jinlan
authors.initials: J
authors.lastname: Wang