Low-Energy Electronic States of Carbon Nanocones in an Electric Field

Jun-Liang Chen, Ming-Horng Su, Chi-Chuan Hwang, Jian-Ming Lu, Chia-Chang Tsai
2010 Nano-Micro Letters  
The low-energy electronic states and energy gaps of carbon nanocones in an electric field are studied using a single-S-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
more » ... ion 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.
doi:10.5101/nml.v2i2.p121-125 fatcat:2ozfu36ezzcwpab66kovd7kgei