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Strain Induced Insulator-Metal Transition in Single Wall Carbon Nanotubes |
DING Jian-Wen;YAN Xiao-Hong;LIU Chao-Ping;TANG Na-Si |
Department of Physics, Xiangtan University, Xiangtan 411105
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Cite this article: |
DING Jian-Wen, YAN Xiao-Hong, LIU Chao-Ping et al 2004 Chin. Phys. Lett. 21 704-706 |
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Abstract In terms of a single-π orbital model, an analytical expression of the lowest-lying conduction-band and the highest-lying valence-band is derived for single wall carbon nanotubes under both the uniaxial and torsional strains. We observe not only semiconductor-metal transitions in primary metallic tubes, but also insulator-metal transitions in semiconducting tubes. Additionally, an indirect transition of electrons and a quantized electron-resonance have been expected in optical spectrum experiments of the nanotubes.
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Keywords:
61.48.+c
62.25.+g
71.20.Tx
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Published: 01 April 2004
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