Hopping Conductivity in a Single-Walled Carbon Nanotube Network
FANG Jing-Hai, LIU Li-Wei, KONG Wen-Jie, CAI Jian-Zhen, LU Li
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Hopping Conductivity in a Single-Walled Carbon Nanotube Network
FANG Jing-Hai;LIU Li-Wei;KONG Wen-Jie;CAI Jian-Zhen;LU Li
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100080
关键词 ：
72.80.Rj ,
67.55.Hc ,
61.48.+c
Abstract ： 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)=G0 exp[-(T0 /T)1/2 ] with T0 =15.8K at a wide temperature range from 4K 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 4K. The results are explained in terms of the coherent hopping of carriers in the presence of a Coulomb gap at low temperature.
Key words ：
72.80.Rj
67.55.Hc
61.48.+c
出版日期: 2006-04-01
引用本文:
FANG Jing-Hai;LIU Li-Wei;KONG Wen-Jie;CAI Jian-Zhen;LU Li. Hopping Conductivity in a Single-Walled Carbon Nanotube Network[J]. 中国物理快报, 2006, 23(4): 953-955.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2006/V23/I4/953
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