Theory of Superconductivity of Carbon Nanotubes and Graphene(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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概要

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• 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.

• 社団法人日本物理学会の論文
• 2007-03-15

著者

• Saito Riichiro

  Department Of Physics Tohoku University

• Saito Riichiro

  Department Of Electronic Engineering University Of Electro-communications

• ONARI Seiichiro

  Department of Applied Physics, Nagoya University

• Jiang Jie

  Department Of Physics North Carolina State University

• Jiang Jie

  Department Of Mathematics Jilin University

• Sasaki Ken-ichi

  Department Of Pathology Sapporo Medical University School Of Medicine

• Tanaka Yukio

  Department Of Applied Physics Nagoya University:crest Japan Science And Technology Agency (jst)

• Tanaka Yukio

  Department Of Applied Physics Nagoya University

• Onari Seiichiro

  Department Of Applied Physics Nagoya University:crest Japan Science And Technology Agency (jst)

• Onari Seiichiro

  Department Of Applied Physics Nagoya University

• Sasaki Ken-ichi

  Department Of Physics Tohoku University

• Sasaki Ken-ichi

  Department Of Chemistry Faculty Of Science Hiroshima University

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