Theory of superconductivity of carbon nanotubes and graphene

Ken Ichi Sasaki, Jie Jiang, Riichiro Saito, Seiichiro Onari, Yukio Tanaka

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

We present a new mechanism of carbon nanotube superconductivity that originates from edge states which are specific to graphene. Using on-site and boundary deformation potentials which do not cause bulk superconductivity, we obtain an appreciable transition temperature for the edge state. As a consequence, a metallic zigzag carbon nanotube having open boundaries can be regarded as a natural superconductor/normal metal/superconductor junction system, in which superconducting states are developed locally at both ends of the nanotube and a normal metal exists in the middle. In this case, a signal of the edge state superconductivity appears as the Josephson current which is sensitive to the length of a nanotube and the position of the Fermi energy. Such a dependence distinguishs edge state superconductivity from bulk superconductivity.

Original languageEnglish
Article number033702
JournalJournal of the Physical Society of Japan
Volume76
Issue number3
DOIs
Publication statusPublished - Mar 2007
Externally publishedYes

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graphene
superconductivity
carbon nanotubes
nanotubes
metals
transition temperature
causes
energy

Keywords

  • Carbon nanotube
  • Edge state
  • Graphene
  • Superconducivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Theory of superconductivity of carbon nanotubes and graphene. / Sasaki, Ken Ichi; Jiang, Jie; Saito, Riichiro; Onari, Seiichiro; Tanaka, Yukio.

In: Journal of the Physical Society of Japan, Vol. 76, No. 3, 033702, 03.2007.

Research output: Contribution to journalArticle

Sasaki, Ken Ichi ; Jiang, Jie ; Saito, Riichiro ; Onari, Seiichiro ; Tanaka, Yukio. / Theory of superconductivity of carbon nanotubes and graphene. In: Journal of the Physical Society of Japan. 2007 ; Vol. 76, No. 3.
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