Kondo resonance enhanced supercurrent in single wall carbon nanotube Josephson junctions

Details Kondo resonance enhanced supercurrent in single wall carbon nanotube Josephson junctions Kondo resonance enhanced supercurrent in single wall carbon nanotube Josephson junctions

2006-01-17

arxiv.org/abs/cond-mat/0601371v3

New Journal of Physics 9 (2007) 124 (http://www.iop.org/EJ/abstract/1367-2630/9/5/124)

Physics

Condensed Matter

Superconductivity

4 figures

Scientific paper

10.1088/1367-2630/9/5/124

We have contacted single wall carbon nanotubes grown by chemical vapor deposition to superconducting Ti/Al/Ti electrodes. The device, we here report on is in the Kondo regime exhibiting a four-fold shell structure, where a clear signature of the superconducting electrodes is observed below the critical temperature. Multiple Andreev reflections are revealed by sub-gap structure and a narrow peak in the differential conductance around zero bias is seen depending on the shell filling. We interpret the peak as a proximity induced supercurrent and examine its interplay with Kondo resonances.

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