Spin gap and Luttinger liquid description of the NMR relaxation in carbon nanotubes

Abstract

Recent NMR experiments by Singer et al. [Singer et al. 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 (~ 30K), which crosses over smoothly to the Luttinger liquid behaviour with increasing temperature.

5 pages, 1 figure, 1 table

References in corpus (1)

• Finite-Size Bosonization and Self-Consistent Harmonic Approximation

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• Theory of the conductance of interacting quantum wires with good contacts and applications to carbon nanotubes
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• Spin Pumping into Carbon Nanotubes
• Strong correlation effects in single-wall carbon nanotubes
• Intertube effects on one-dimensional correlated state of metallic single-wall carbon nanotubes probed by 13C NMR
• Quasi-two-dimensional spin helix and magnon-induced singularity in twisted bilayer graphene