Bound excitons in metallic single-walled carbon nanotubes

被引：97

作者：

Deslippe, Jack

Spataru, Catalin D.

Prendergast, David

Louie, Steven G. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Columbia Univ, Ctr Integrated Sci & Engn, New York, NY 10027 USA

[4] Columbia Univ, Ctr Electron Mol Nanostruct, New York, NY 10027 USA

[5] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 06期

关键词：

D O I：

10.1021/nl070577f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We extend previous ab initio calculations on excitonic effects in metallic single-walled carbon nanotubes to more experimentally realizable larger diameter tubes. Our calculations predict bound exciton states in both the (10,10) and (12,0) tubes with binding energies of approximately 50 meV providing experimentally verifiable changes to the absorption line shape in each case. The second and third van Hove singularities in the joint density of states also give rise to a single optically active bound or resonant excitonic state.

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页码：1626 / 1630

页数：5

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