Enhanced NMR relaxation of Tomonaga-Luttinger liquids and the magnitude of the carbon hyperfine coupling in single-wall carbon nanotubes.
Phys Rev Lett
; 107(18): 187204, 2011 Oct 28.
Article
em En
| MEDLINE
| ID: mdl-22107670
ABSTRACT
Recent transport measurements [Churchill et al. Nature Phys. 5, 321 (2009)] found a surprisingly large, 2-3 orders of magnitude larger than usual (13)C hyperfine coupling (HFC) in (13)C enriched single-wall carbon nanotubes. We formulate the theory of the nuclear relaxation time in the framework of the Tomonaga-Luttinger liquid theory to enable the determination of the HFC from recent data by Ihara et al. [Europhys. Lett. 90, 17,004 (2010)]. Though we find that 1/T(1) is orders of magnitude enhanced with respect to a Fermi-liquid behavior, the HFC has its usual, small value. Then, we reexamine the theoretical description used to extract the HFC from transport experiments and show that similar features could be obtained with HFC-independent system parameters.
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Base de dados:
MEDLINE
Assunto principal:
Solventes
/
Espectroscopia de Ressonância Magnética
/
Nanotubos de Carbono
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article