Two-dimensional carbon allotrope with strong electronic anisotropy
Two-dimensional carbon allotrope with strong electronic anisotropy
复制标题
具有强电子各向异性的二维碳同素异形体
DOI：
10.1103/physrevb.87.075453
复制
发表时间：
2013-02-28
影响因子：
3.7
通讯作者：
Feng, Ji
中科院分区：
文献类型：
--
作者：
Su, Cong;Jiang, Hua;Feng, Ji
Two novel two-dimensional carbon allotropes comprised of octagons and pentagons are proposed based on the first-principles calculations. The two carbon allotropes, named OPG-L and OPG-Z, are found to have distinct properties. OPG-L is metallic, while OPG-Z is a gapless semimetal. Remarkably, OPG-Z exhibits pronounced electronic anisotropy with highly anisotropic Dirac points at the Fermi level. A tight-binding model is suggested to describe the low-energy quasiparticles, which clarifies the origin of the anisotropic Dirac points. Such an anisotropic electronic characteristic of OPG-Z is expected to have wide implications in nano-electronics.
