Nonlinear charging and transport times in doped nanotubes junctions

Keivan Esfarjani, Amir A. Farajian, Yoshiyuki Kawazoe, Siu Tat Chui

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The nonlinear capacitance in doped nanotube junctions is calculated self consistently. A negative differential capacitance is observed when the applied bias becomes larger than the pseudogap of the metallic armchair nanotube. For this device, one can deduce a relaxation time of approximately 0.1 fs. Because of its negative differential resistance (NDR), a switching time of less than a femtosecond, i.e., at least three orders smaller than present-day switching times, can also be estimated. This effect is important in designing ultrafast nano-electronic components.

Original languageEnglish
Pages (from-to)515-518
Number of pages4
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 2005 Feb


  • Device
  • Junction
  • Nanotube
  • Response time
  • Transport

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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