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Phys. Rev. Lett. 104, 016803 (2010) [4 pages]

Intrinsic Magnetoresistance of Single-Walled Carbon Nanotubes Probed by a Noncontact Method

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Yugo Oshima1,*, Taishi Takenobu1, Kazuhiro Yanagi2,3, Yasumitsu Miyata2, Hiromichi Kataura2,3, Kenji Hata4, Yoshihiro Iwasa1, and Hiroyuki Nojiri1
1Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan
2Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8562, Japan
3CREST, Japan Science and Technology Agency (JST), Honcho 4-1-8, Kawaguchi 332-0012, Japan
4Research Center for Advanced Carbon Materials, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8562, Japan

Received 26 May 2009; published 6 January 2010

The intrinsic magnetotransport effect of the single-walled carbon nanotube (SWNT) has been observed by the cavity perturbation technique, which is a noncontact method for evaluating transport properties. The inverse Q factor of the cavity resonator, which corresponds to the resistance of the sample, shows a linear increase as a function of the magnetic field. The angular and tube diameter dependence of oriented SWNT thin films, and measurements using sorted SWNTs reveal that the observed positive magnetoresistance is due to the Aharonov-Bohm effect of metallic nanotubes.

© 2010 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.104.016803
DOI:
10.1103/PhysRevLett.104.016803
PACS:
73.63.Fg, 75.47.Pq, 78.67.Ch

*Present address: RIKEN, Hirosawa 2-1, Wako, 351-0198, Japan.

yugo@riken.jp

 
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