A graphene composed of pentagons and octagons | Zendy

Chi-Pui Tang | Zendy; ShiJie Xiong | Zendy

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A graphene composed of pentagons and octagons

Author(s) -

Chi-Pui Tang,

ShiJie Xiong

Publication year - 2012

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4768669

Subject(s) - graphene , brillouin zone , anisotropy , materials science , condensed matter physics , atom (system on chip) , electron , dispersion (optics) , conductor , physics , nanotechnology , optics , composite material , quantum mechanics , embedded system , computer science

We report a possible stable structure of graphene on basis of the first principle calculation. This possible two-dimensional (2D) structure consists of pentagons and octagons (PO), and likely be formed from ordinary graphene by periodically inserting specific defects. Its density is 2.78 Atom/Å2 and the cohesive energy per atom is −8.96 eV, slightly higher than that of graphene. The calculation indicates that PO-graphene behaves like a 2D anisotropic metal. The dispersion relation of electrons near the Fermi surface shows a significant flat segment along a direction and linear behavior in different regions of the Brillouin zone. If the growth of samples is successful, the PO-graphene not only be used as anisotropy conductor and other practical application, but also can be served as a good sample for experiments which need 2D anisotropic materials

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