Gap opening in graphene by shear strain

被引：324

作者：

Cocco, Giulio ^{[1
]}

Cadelano, Emiliano ^{[1
]}

Colombo, Luciano ^{[1
]}

机构：

[1] Univ Cagliari, Dept Phys, I-09042 Cagliari, Italy

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 24期

关键词：

CARBON;

D O I：

10.1103/PhysRevB.81.241412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We exploit the concept of strain-induced band-structure engineering in graphene through the calculation of its electronic properties under uniaxial, shear, and combined uniaxial-shear deformations. We show that by combining shear deformations to uniaxial strains it is possible modulate the graphene energy-gap value from zero up to 0.9 eV. Interestingly enough, the use of a shear component allows for a gap opening at moderate absolute deformation, safely smaller than the graphene failure strain.

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