Charge transport in transparent single-wall carbon nanotube networks

被引：25
|
作者：
Jaiswal, Manu [1 ]
Wang, Wei
Fernando, K. A. Shiral
Sun, Ya-Ping
Menon, Reghu
机构：
[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India
[2] Clemson Univ, Dept Chem, Clemson, SC 29634 USA
[3] Clemson Univ, Lab Emerging Mat & Technol, Clemson, SC 29634 USA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2007年 / 19卷 / 44期
关键词：
D O I：
10.1088/0953-8984/19/44/446006
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report the electric-field effects and magnetotransport in transparent networks of single-wall carbon nanotubes (SWNT). The temperature dependence of conductance of the network indicates a 2D Mott variable-range hopping (VRH) transport mechanism. Electric field and temperature are shown to have similar effects on the carrier hops and identical exponents for the conductance of the network are obtained from the high electric field and temperature dependences. A power-law temperature dependence with an exponent 3/2 for the threshold field is obtained and explained as a result of the competing contributions from electric field and phonons to the carrier hop. A negative magnetoresistance (MR) is observed at low temperatures, which arises from a forward interference scattering mechanism in the weak scattering limit, consistent with the VRH transport.
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页数：8
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