|
|||||
|
|
Effect of vacancy defect on electrical properties of chiral single-walled carbon nanotube under external electrical field |
|
| Authors: | Luo Yu-Pin Tien Li-Gan Tsai Chuen-Horng Lee Ming-Hsien Li Feng-Yin |
| Affiliation: | Department of Electronic Engineering, National Formosa University, Yunlin County, Taiwan 632, China; Department of Engineering and System Science, National Tsing Hua University, Hsin Chu, Taiwan 300, China; Department of Physics, Tamkang University, Tamsui, Taipei County, Taiwan 251, China; Department of Chemistry, National Chung Hsing University, Taichung, Taiwan 420, China |
| Abstract: | Ab initio calculations demonstrated that the energy gap modulation of a chiral carbon nanotube with mono-vacancy defect can be achieved by applying a transverse electric field. The bandstructure of this defective carbon nanotube varying due to the external electric field is distinctly different from those of the perfect nanotube and defective zigzag nanotube. This variation in bandstructure strongly depends on not only the chirality of the nanotube and also the applied direction of the transverse electric field. A mechanism is proposed to explain the response of the local energy gap between the valence band maximum state and the local gap state under external electric field. Several potential applications of these phenomena are discussed. |
| Keywords: | chiral carbon nanotube mono-vacancy defect energy gap external electric field |
| 本文献已被 维普 等数据库收录！ | |
| 点击此处可从《中国物理 B》浏览原始摘要信息 | |
| 点击此处可从《中国物理 B》下载免费的PDF全文 | |