Band-gap modification by radial deformation in carbon nanotubes

被引：141

作者：

Park, CJ ^{[1
]}

Kim, YH ^{[1
]}

Chang, KJ ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.60.10656

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Calculations of the electronic structure demonstrate that band gap modification such as opening and closure is easily achieved by radial deformations perpendicular to the tube axis. Deformations open the gap in metallic armchair tubes only if the mirror symmetries are broken, and further distortions greatly enhance the gap due to new bonds formed between facing layers. Similar deformations increase the gap in small-gap zigzag tubes, but gap closure occurs due to enhanced sigma*-pi* hybridization effects. This band gap modification is crucial at metal contacts and has important implication in fabricating a quantum dot or multiple quantum dots. [S0163-1829(99)13039-X].

引用

页码：10656 / 10659

页数：4

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