期刊
AIP ADVANCES
卷 2, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4768669
关键词
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资金
- State Key Programs for Basic Research of China [2011CB922102]
- National Foundation of Natural Science in China [10874071, 61076094]
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/angstrom(2) 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. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4768669]
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