| Hopping Conductivity in a Single-Walled Carbon Nanotube Network |
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| 引用本文： | 方靖海 刘立伟 孔文婕 蔡建臻 吕力. Hopping Conductivity in a Single-Walled Carbon Nanotube Network[J]. 中国物理快报, 2006, 23(4): 953-955 |
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| 作者姓名： | 方靖海 刘立伟 孔文婕 蔡建臻 吕力 |
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| 作者单位： | Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100080 |
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| 基金项目： | Supported by the National Center for Nanoscience and Technology of China under Grant No 10374108. |
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| 摘 要： | We investigate the resistance and magnetoresistance （MR） of an entangled single-walled carbon nanotube （SWNT） network. The temperature dependence of conductance is fitted by formula G（T） = Go exp[-（To/T）^1/2] with To = 15.8 K at a wide temperature range from 4 K to 300K. The MR defined by [R（T, H） - R（T, 0）]/ R（T, 0） as a function of temperature and magnetic field perpendicular to the tube axis is negative at low temperatures. The MR amplitude increases as the temperature decreases at relative high temperature, but becomes decrease when temperature below 4 K. The results are explained in terms of the coherent hopping of carriers in the presence of a Coulomb gap at low temperature.
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| 关 键 词： | 电导性 单壁碳纳米管网络 磁致电阻 磁场 |
| 收稿时间： | 2005-12-28 |
| 修稿时间： | 2005-12-28 |
Hopping Conductivity in a Single-Walled Carbon Nanotube Network |
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| FANG Jing-Hai, LIU Li-Wei, KONG Wen-Jie, CAI Jian-Zhen, LU Li. Hopping Conductivity in a Single-Walled Carbon Nanotube Network[J]. Chinese Physics Letters, 2006, 23(4): 953-955 |
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| Authors: | FANG Jing-Hai LIU Li-Wei KONG Wen-Jie CAI Jian-Zhen LU Li |
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