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A new Dirac cone material: a graphene-like Be3C2 monolayer

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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 Be3C2 monolayer with a hexagonal honeycomb structure. The Dirac point occurs exactly at the Fermi level and arises from the merging of the hybridized pz bands 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 Be3C2 monolayer a promising 2D material for special electronics applications.

Graphical abstract: A new Dirac cone material: a graphene-like Be3C2 monolayer

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Publication details

The article was received on 19 Jan 2017, accepted on 22 Mar 2017 and first published on 29 Mar 2017


Article type: Paper
DOI: 10.1039/C7NR00455A
Citation: Nanoscale, 2017, Advance Article
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    A new Dirac cone material: a graphene-like Be3C2 monolayer

    B. Wang, S. Yuan, Y. Li, L. Shi and J. Wang, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR00455A

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