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APS » Journals » Phys. Rev. Lett. » Volume 96 » Issue 5
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Phys. Rev. Lett. 96, 057001 (2006) [4 pages]

Superconductivity in Entirely End-Bonded Multiwalled Carbon Nanotubes

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I. Takesue1,4, J. Haruyama1,4,*, N. Kobayashi1, S. Chiashi2, S. Maruyama2, T. Sugai3,4, and H. Shinohara3,4
1Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 229-8558, Japan
2Tokyo University, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
3Nagoya University, Furo-cho, Chigusa, Nagoya 464-8602, Japan
4JST-CREST, 4-1-8 Hon-machi, Kawaguchi, Saitama 332-0012, Japan

Received 12 February 2005; revised 13 March 2005; published 10 February 2006

We report that entirely end-bonded multiwalled carbon nanotubes (MWNTs) can exhibit superconductivity with a transition temperature (Tc) as high as 12 K, which is approximately 30 times greater than Tc reported for ropes of single-walled nanotubes. We find that the emergence of this superconductivity is highly sensitive to the junction structures of the Au electrode/MWNTs. This reveals that only MWNTs with optimal numbers of electrically activated shells, which are realized by end bonding, can allow superconductivity due to intershell effects.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.057001
DOI:
10.1103/PhysRevLett.96.057001
PACS:
74.70.Wz, 74.78.Na

*Corresponding author.

Electronic address: J-haru@ee.aoyama.ac.jp

 
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