A symmetrized-basis approach to excitons in carbon nanotubes

被引：0

作者：

Bussi, G ^{[1
]}

Chang, E ^{[1
]}

Ruini, A ^{[1
]}

Molinari, E ^{[1
]}

机构：

[1] Univ Modena, INFM, Natl Ctr Nanostruct & Biosyst Surfaces, I-41100 Modena, Italy

来源：

PHYSICS OF SEMICONDUCTORS, PTS A AND B | 2005年 / 772卷

关键词：

D O I：

暂无

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We calculate from first-principles the optical spectrum of a (4,2) single-wall carbon nanotube including quasi-particle corrections and excitonic effects. We expand every quantity on a special basis sets which completely exploits the symmetries of the nanotube, allowing calculations for tubes with a long unit cell. The results indicate that the excitonic effects are crucial and a strong peak in the absorption spectrum is predicted at 2.2 eV This value is compared with experimental results, with excellent agreement.

引用

页码：1025 / 1026

页数：2

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