Low-energy electronic states of carbon nanocones in an electric field

来源 :Nano-Micro Letters | 被引量 : 0次 | 上传用户:lu123127
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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. 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 the low-energy electronic states and energy gaps of a carbon nanocones are highly sensitive to its geometric shape (ie 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 was particularly pronounced at higher strength of the applied electric field , and is strongly related to the geometric structure of the nanocone.
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