title: Spin gap and Luttinger liquid description of the NMR relaxation in carbon nanotubes.
abstract: Recent NMR experiments by Singer et al. [Singer, Phys. Rev. Lett. 95, 236403 (2005).] showed a deviation from Fermi-liquid behavior in carbon nanotubes with an energy gap evident at low temperatures. Here, a comprehensive theory for the magnetic field and temperature dependent NMR 13C spin-lattice relaxation is given in the framework of the Tomonaga-Luttinger liquid. The low temperature properties are governed by a gapped relaxation due to a spin gap ( approximately 30 K), which crosses over smoothly to the Luttinger liquid behavior with increasing temperature.
authors.affiliation: Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzer Strasse 38, 01187 Dresden, Germany. dora@mpipks-dresden.mpg.de
authors.forename: Balázs
authors.initials: B
authors.lastname: Dóra
authors.forename: Miklós
authors.initials: M
authors.lastname: Gulácsi
authors.forename: Ferenc
authors.initials: F
authors.lastname: Simon
authors.forename: Hans
authors.initials: H
authors.lastname: Kuzmany