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

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

2007-07-23

arxiv.org/abs/0707.3348v1

Phys. Rev. Lett. 99, 166402 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 figure, 1 table

Scientific paper

10.1103/PhysRevLett.99.166402

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.

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