Linear conductance of multiwalled carbon nanotubes at high temperatures |
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Authors: | F Zhou DL Zhang ZW Pan SS Xie |
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Institution: | Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China |
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Abstract: | We have studied the electrical conductance of gas-desorbed multiwalled carbon nanotubes (MWNTs) at high temperatures, and found a peculiar linear temperature dependence of conductance over a wide temperature range from 100 to 800 K. We interpret this phenomenon by using a thermal activation picture of conduction channels below the gap in the vicinity of the Dirac points. The result also indicates a very short and temperature-independent electron mean free path in our MWNTs, and provides a way to determine the number of residual conduction channels in the MWNTs. |
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Keywords: | 73 63 &minus b 72 80 Rj 73 23 &minus b |
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