Dirac cone in α-graphdiyne: a first-principles study

被引：39

作者：

Niu, Xiaoning ^{[1
]}

Mao, Xingze ^{[1
]}

Yang, Dezheng ^{[1
]}

Zhang, Zhiya ^{[1
]}

Si, Mingsu ^{[1
]}

Xue, Desheng ^{[1
]}

机构：

[1] Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China

来源：

NANOSCALE RESEARCH LETTERS | 2013年 / 8卷

基金：

美国国家科学基金会;

关键词：

alpha-graphdiyne; Dirac cone; First-principles calculation;

D O I：

10.1186/1556-276X-8-469

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigate the Dirac cone in alpha-graphdiyne, which is a predicted flat one-atom-thick allotrope of carbon using first-principles calculations. alpha-graphdiyne is derived from graphene where two acetylenic linkages (-C a parts per thousand C-) are inserted into the single bonds (-C-C-). Thus, alpha-graphdiyne possesses a larger lattice constant which subsequently affects its electronic properties. Band structures show that alpha-graphdiyne exhibits similar Dirac points and cone to graphene. Further, the tight-binding method is used to exploit the linear dispersion in the vicinity of Dirac points. Thanks to the larger lattice constant, alpha-graphdiyne yields a lower Fermi velocity, which might make itself an ideal material to serve the anomalous integer quantum Hall effect.

引用

页码：1 / 5

页数：5

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