Single-walled carbon nanotube weak links in Kondo regime with zero-field splitting

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2009
Major/Subject
Mcode
Degree programme
Language
en
Pages
073404/1-4
Series
Physical Review B, Volume 79, Issue 7
Abstract
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 TK=1–14 K, and the measured critical current ICM vs TK displays two distinct branches; these branches, distinguished by zero-field splitting of the normal-state Kondo conductance peak, differ by an order of magnitude at large values of TK. Evidence for renormalization of Andreev levels in Kondo regime is also found.
Description
Keywords
carbon nanotubes, critical currents, hyperfine interactions, Kondo effect, proximity effect (superconductivity), superconducting materials
Other note
Citation
Wu, F. & Danneau, R. & Queipo, P. & Kauppinen, E. & Tsuneta, T. & Hakonen, Pertti J. 2009. Single-walled carbon nanotube weak links in Kondo regime with zero-field splitting. Physical Review B. Volume 79, Issue 7. 073404/1-4. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.79.073404