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

Autor(en)

Yoshihiko Ihara, Pawel Wzietek, Henri Alloul, Mark Rümmeli, Thomas Pichler, Ferenc Simon

Abstrakt

We report C-13 nuclear magnetic resonance measurements on C-13-enriched single-wall carbon nanotube (SWCNT) bundles. The temperature dependence of the nuclear spin-lattice relaxation rate, 1/T-1, 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.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Centre National De La Recherche Scientifique (CNRS), Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden

Journal

Europhysics Letters

Band

90

Anzahl der Seiten

5

ISSN

0295-5075

DOI

https://doi.org/10.1209/0295-5075/90/17004

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f082fe0a-1796-49b9-958f-baa94567d56a