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Electronic states of metallic and semiconducting carbon nanotubes with bond and site disorder

Kikuo Harigaya
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Abstract

Disorder effects on the density of states in carbon nanotubes are analyzed by a tight binding model with Gaussian bond or site disorder. Metallic armchair and semiconducting zigzag nanotubes are investigated. In the strong disorder limit, the conduction and valence band states merge, and a finite density of states appears at the Fermi energy in both of metallic and semiconducting carbon nanotubes. The bond disorder gives rise to a huge density of states at the Fermi energy differently from that of the site disorder case. Consequences for experiments are discussed.

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Kikuo Harigaya. 1999-04-16. Electronic states of metallic and semiconducting carbon nanotubes with bond and site disorder. https://doi.org/10.1103/physrevb.60.1452

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