Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-06-08
Phys. Rev. Lett. 107, 187204 (2011)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages plus 2 supplementary materials
Scientific paper
10.1103/PhysRevLett.107.187204
Recent transport measurements [Churchill \textit{et al.} Nat. Phys. \textbf{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 (SWCNTs). 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 \textit{et al.} [Ihara \textit{et al.} EPL \textbf{90}, 17004 (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.
Alloul Henri
Dóra Balázs
Ihara Yutaka
Kiss Ádám
Koltai János
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