Modulation of electronic states in semiconducting carbon-nanotubes with external electrodes

Mikio Murata, Mikio Eto

Research output: Contribution to journalConference articlepeer-review


Electronic states are theoretically studied in carbon-nanotubes with external electrodes. To elucidate effects of the electrodes, we examine roles of external modulating potentials. In metallic nanotubes, the potentials hardly affect the energy levels nor envelope functions of the wavefunctions. In semiconducting nanotubes, however, the external potentials significantly influence the electronic states: With increasing the strength of the potentials, the energy gap decreases to zero, whereas the wavefunctions are more localized.

Original languageEnglish
Pages (from-to)384-385
Number of pages2
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-4
Publication statusPublished - 2003 Apr 1
EventProceedings pf the International Conference on Superlattices - ICSNN 2002 - Touluse, France
Duration: 2002 Jul 222002 Jul 26


  • Carbon-nanotube
  • Coulomb oscillation
  • Effective-mass approximation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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