Electric and magnetic field effects on electronic structure of straight and toroidal carbon nanotubes
AUTOR(ES)
Rocha, C. G., Pacheco, M., Barticevic, Z., Latgé, A.
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2004-06
RESUMO
Nanotubes have been proved as promising candidates for many technological applications in the nanoscale word and different physical properties have been studied and measured along the few recent years. Here we investigate the role played by external magnetic and electric fields on the electronic properties of toroidal and cylindrical straight carbon nanotubes. A single-p band tight-binding Hamiltonian is used and two types of model-calculations are adopted: real-space renormalization techniques, based on Green function formalism, and straight diagonalization calculation. Both electric and magnetic fields may be properly applied, in different configurations, to modify the energy spectra and transport properties, providing metal-insulator transitions for particular tube geometries.
Documentos Relacionados
- Magnetic field effects of double-walled carbon nanotubes
- Conformational analysis and electronic structure of chiral carbon and carbon nitride nanotubes
- Optical properties of carbon nanotubes under external electric fields
- Noncovalent functionalization of carbon nanotubes for highly specific electronic biosensors
- Magnetic amphiphilic composites based on carbon nanotubes and nanofibers grown on an inorganic matrix: effect on water-oil interfaces