Comment on "Band structure engineering of graphene by strain: First-principles calculations"

Details Comment on "Band structure engineering of graphene by strain: First-principles calculations" Comment on "Band structure engineering of graphene by strain: First-principles calculations"

2009-03-10

arxiv.org/abs/0903.1702v2

Phys. Rev. B 80, 167401 (2009)

Physics

Condensed Matter

Materials Science

published version

Scientific paper

10.1103/PhysRevB.80.167401

In their first-principles calculations of the electronic band structure of graphene under uniaxial strain, Gui, Li, and Zhong [Phys. Rev. B \textbf{78}, 075435 (2008)] have found opening of band gaps at the Fermi level. This finding is in conflict with the tight-binding description of graphene which is closed gap for small strains. In this Comment, we present first-principles calculations which refute the claim that strain opens band gaps in graphene.

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