Incidence of the Tomonaga-Luttinger liquid state on the NMR spin-lattice relaxation in carbon nanotubes

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Published 3 May 2010 • Europhysics Letters Association
, , Citation Y. Ihara et al 2010 EPL 90 17004 DOI 10.1209/0295-5075/90/17004

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Author affiliations

1 Laboratoire de Physique des Solides, Université Paris-Sud 11, CNRS UMR 8502 - 91405 Orsay, France, EU

2 IFW Dresden - P.O. Box 270116, D-01171 Dresden, Germany, EU

3 University of Vienna, Faculty of Physics - Strudlhofgasse 4, A-1090 Wien, Austria, EU

4 Budapest University of Technology and Economics, Institute of Physics - H-1521 Budapest, Hungary, EU

Dates

  1. Received 26 January 2010
  2. Accepted 29 March 2010
  3. Published
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0295-5075/90/1/17004

Abstract

We report 13C nuclear magnetic resonance measurements on 13C-enriched single-wall carbon nanotube (SWCNT) bundles. The temperature dependence of the nuclear spin-lattice relaxation rate, 1/T1, exhibits a power law variation, as expected for a Tomonaga-Luttinger liquid (TLL). The observed exponent is smaller than that expected for the two-band TLL model. A departure from the power law is observed only at low T, where thermal and electronic Zeeman energy merge. Extrapolation to zero magnetic field indicates gapless spin excitations. The wide T range on which power law behaviour is observed suggests that SWCNT is so far the best realization of a one-dimensional quantum metal.

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