The single π-band tight-binding method, with the nearest neighbor interactions, is used to calculate the electronic properties of the nanographite ribbons in a spatially modulated electric field. The electric field destroys state degeneracy, modifies energy dispersions, alters subband spacings, changes energy band gap, and causes the semiconductor-metal transition. The growth of field period could enhance the modulation ability of the electric field. The energy gap is very sensitive to the field strength, field period, and ribbon width. The changes of energy subband are completely reflected on the features of density of states (DOS). The strength and the period of the electric field have great influence on DOS, namely, changing frequency of the first peak, altering peak height, shifting peak position, and even producing new peaks.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Mechanical Engineering
- Materials Chemistry
- Electrical and Electronic Engineering