Fermi level dependent optical transition energy in metallic single-walled carbon nanotubes
文献类型：期刊论文
| 作者 | L. C. Yin ; H. M. Cheng ; R. Saito ; M. S. Dresselhaus |
| 刊名 | Carbon
 |
| 出版日期 | 2011 |
| 卷号 | 49期号:14页码:4774-4780 |
| 关键词 | brillouin-zone integrations augmented-wave method raman-scattering electronic-properties thermal-expansion spectroscopy energetics modes |
| ISSN号 | 0008-6223 |
| 中文摘要 | The influence of electron (hole) doping on the electronic structure of metallic single-walled carbon nanotubes (m-SWCNTs) is discussed by first principles calculations. The lattice constant c along the nanotube axis of m-SWCNTs (an (8,8) armchair and a (12,0) zigzag SWCNT, as examples) is calculated as a function of the Fermi energy. We find that the lengths of c for both sample nanotubes remain unchanged when the Fermi level changes between the first pair of van Hove singularities (VHS) states, while c decreases with increasing or decreasing Fermi level beyond that region. The decrease in c results in a decrease of the C-C bond length parallel to the tube axis (B(A)), while it increases the C-C bond length perpendicular to the tube axis (B(R)). By studying the energy separation (E(11)(M)) between the first pair of VHS states, we also find that E(11)(M) shows a similar behavior to those shown by c with changing Fermi level. Our study gives theoretical support for the optical properties of CNTs that are observed by electron/hole doping. (C) 2011 Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30846]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. C. Yin,H. M. Cheng,R. Saito,et al. Fermi level dependent optical transition energy in metallic single-walled carbon nanotubes[J]. Carbon,2011,49(14):4774-4780. |
| APA | L. C. Yin,H. M. Cheng,R. Saito,&M. S. Dresselhaus.(2011).Fermi level dependent optical transition energy in metallic single-walled carbon nanotubes.Carbon,49(14),4774-4780. |
| MLA | L. C. Yin,et al."Fermi level dependent optical transition energy in metallic single-walled carbon nanotubes".Carbon 49.14(2011):4774-4780. |
入库方式： OAI收割
来源：金属研究所
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