Research on the Relationship between Density of States and Conducting Properties of Single-walled Carbon Nanotubes

J Mater Sci Technol ›› 2003, Vol. 19 ›› Issue (02): 110-112.

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Research on the Relationship between Density of States and Conducting Properties of Single-walled Carbon Nanotubes

Zhenhua ZHANG, Jingcui PENG, Xiaohua CHEN, Jianxiong WANG

Department of Information and Calculating Science, Changsha Communications University, Changsha 410076, China...

Received:1900-01-01 Revised:1900-01-01 Online:2003-03-28 Published:2009-10-10
Contact: Zhenhua ZHANG

Abstract

Abstract: The analytical expression of the electronic density of states (DOS) for single-walled carbon nanotubes (SWNTs) has been derived on the basis of graphene approximation of the energy E(k) near the Fermi level EF. The distinctive properties of the DOS, the normalized differential conductivity and the current vs bias for SWNTs are deduced and analyzed theoretically. The singularities in the DOS (or in the normalized differential conductivity) predict that the jump structure of current (or conductance)---bias of SWNTs exists. All conclusions from the theoretical analysis are in well agreement with the experimental results of SWNT's electronic structure and electronic transport. In other words, the simple theoretical model in this paper can be applied to understand a range of spectroscopic and other measurement data related to the DOS of SWNTs.

Key words: Single-walled carbon nanotubes, Graphene approximation of energy...

Zhenhua ZHANG, Jingcui PENG, Xiaohua CHEN, Jianxiong WANG. Research on the Relationship between Density of States and Conducting Properties of Single-walled Carbon Nanotubes[J]. J Mater Sci Technol, 2003, 19(02): 110-112.

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Research on the Relationship between Density of States and Conducting Properties of Single-walled Carbon Nanotubes

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