Spin gap and Luttinger liquid description of the NMR relaxation in carbon nanotubes.
نویسندگان
چکیده
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.
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عنوان ژورنال:
- Physical review letters
دوره 99 16 شماره
صفحات -
تاریخ انتشار 2007