High‐<i>T</i><sub>c</sub> superconductivity in entirely end‐bonded multi‐walled carbon nanotubes

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<jats:title>Abstract</jats:title><jats:p>We report that entirely end‐bonded multi‐walled carbon nanotubes (MWNTs) can exhibit superconductivity with a transition temperature (<jats:italic>T</jats:italic> <jats:sub>c</jats:sub>) as high as 12 K, which is approximately 30 times greater than <jats:italic>T</jats:italic> <jats:sub>c</jats:sub> 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 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</jats:p>

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