Tunable double Dirac cone spectrum in bilayer α-graphyne

被引：66

作者：

Leenaerts, O. ^{[1
]}

Partoens, B. ^{[1
]}

Peeters, F. M. ^{[1
]}

机构：

[1] Univ Antwerp, Dept Fys, B-2020 Antwerp, Belgium

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 01期

关键词：

ULTRASOFT PSEUDOPOTENTIALS;

D O I：

10.1063/1.4812977

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Monolayer alpha-graphyne was recently proposed as a new all-carbon material having an electronic spectrum consisting of Dirac cones. Based on a first-principles investigation of bilayer alpha-graphyne, we show that the electronic band structure is qualitatively different from its monolayer form and depends crucially on the stacking mode of the two layers. Two stable stacking modes are found: a configuration with a gapless parabolic band structure, similar to AB stacked bilayer graphene, and another one which exhibits a doubled Dirac-cone spectrum. The latter can be tuned by an electric field with a gap opening rate of 0.3 eA. (C) 2013 AIP Publishing LLC.

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页数：4

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