Electronic screening and correlated superconductivity in carbon nanotubes

S. Bellucci; M. Cini; P. Onorato; E. Perfetto

doi:10.1103/physrevb.75.014523

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arXiv · cond-mat/0612075

Electronic screening and correlated superconductivity in carbon nanotubes

S. Bellucci·M. Cini·P. Onorato·E. Perfetto

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Abstract

A theoretical analysis of the superconductivity observed recently in Carbon nanotubes is proposed. We argue that ultra-small (diameter $ \sim 0.4 nm$) single wall carbon nanotubes (with transition temperature $T_c\sim 15 ^{o}K$) and entirely end-bonded multi-walled ones ($T_c\sim 12 ^{o}K$) can superconduct by an electronic mechanism, basically the same in both cases. By a Luttinger liquid -like approach, one finds enhanced superconducting correlations due to the strong screening of the long-range part of the Coulomb repulsion. Based on this finding, we perform a detailed analysis on the resulting Hubbard-like model, and calculate transition temperatures of the same order of magnitude as the measured ones.

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S. Bellucci, M. Cini, P. Onorato, E. Perfetto. 2006-12-04. Electronic screening and correlated superconductivity in carbon nanotubes. https://doi.org/10.1103/physrevb.75.014523

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