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Low-energy electronic states of carbon nanocones in an electric field
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作者 Jun-Liang Chen Ming-Horng Su +2 位作者 Chi-Chuan Hwang Jian-Ming Lu Chia-Chang Tsai 《Nano-Micro Letters》 SCIE EI CAS 2010年第2期121-125,共5页
The low-energy electronic states and energy gaps of carbon nanocones in an electric field are studied using a single-?-band tight-binding model. The analysis considers five perfect carbon nanocones with disclination a... The low-energy electronic states and energy gaps of carbon nanocones in an electric field are studied using a single-?-band tight-binding model. The analysis considers five perfect carbon nanocones with disclination angles of 60°, 120°, 180°, 240° and 300°, respectively. The numerical results reveal that the low-energy electronic states and energy gaps of a carbon nanocones are highly sensitive to its geometric shape(i.e. the disclination angle and height), and to the direction and magnitude of an electric field. The electric field causes a strong modulation of the state energies and energy gaps of the nanocones, changes their Fermi levels, and induces zero-gap transitions. The energy-gap modulation effect becomes particularly pronounced at higher strength of the applied electric field, and is strongly related to the geometric structure of the nanocone. 展开更多
关键词 Low-energy electronic states carbon nanocones Electric field
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