Single-walled carbon nanotube weak links: from Fabry-Pérot to Kondo regime

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We have investigated proximity-induced supercurrents in single-walled carbon nanotubes in the Kondo regime and compared them with supercurrents obtained on the same tube with Fabry-Pérot resonances. Our data display a wide distribution of Kondo temperatures \emph{$T_K$} = 1 - 14 K, and the measured critical current $I_{CM}$ vs. \emph{$T_K$} displays two distinct branches; these branches, distinguished by zero-bias splitting of the normal-state Kondo conductance peak, differ by an order of magnitude at large values of $T_K$. Evidence for renormalization of Andreev levels in Kondo regime is also found.
4 pages, 4 figures

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/169525

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0809.3386
 http://arxiv.org/abs/0809.3386

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arXiv