Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24561
Title: Strain-induced metal-semimetal transition of BeB2 monolayer
Authors: Mu, Y
Ding, F 
Lu, H
Issue Date: 2015
Publisher: Royal Society of Chemistry
Source: RSC advances, 2015, v. 5, no. 15, p. 11392-11396 How to cite?
Journal: RSC Advances 
Abstract: The Dirac point and cones make some two-dimensional materials (e.g., graphene, silicone and graphyne) exhibit ballistic charge transport and enormously high carrier mobilities. Here, we present a novel semimetal with triangular lattice. Metallic BeB2 monolayer could transform to a semimetal with a Dirac point at the Fermi level when the lattice parameters are isotropically compressed by about 5%, while it becomes metallic again under larger compression. The Fermi velocity of semimetallic BeB2 monolayer is 0.857 ¡Ñ 106 m s-1, just a little smaller than that of graphene. Furthermore, it is found that uniaxial compressive strain opens a band gap in the BeB2 monolayer, while uniaxial tensile strain keeps it metallic. Our study expands the Dirac systems and provides new insight to explore novel semimetallic materials.
URI: http://hdl.handle.net/10397/24561
ISSN: 2046-2069
DOI: 10.1039/c4ra14684k
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