Molecular induced field effect in superconducting filmsDm. Shvarts1, M. Hazani1, B. Ya. Shapiro2, G. Leitus3, V. Sidorov1 and R. Naaman1
1 Department of Chemical Physics, Weizmann Institute of Science Rehovot 76100, Israel
2 Physics Department, Bar-Ilan University - Ramat Gan 52900, Israel
3 Chemical Research Support, Weizmann Institute of Science Rehovot 76100, Israel
received 6 June 2005; accepted in final form 14 September 2005
published online 5 October 2005
The study of the effect of self-assembled organic monolayers on the critical current in thin superconducting Nb films is presented. Correlation is found between the coverage of the adsorbed layer and the critical current. A large change of up to 50% in the critical current by the well-organized monolayers is observed. The phenomenon is explained by the adsorption-induced electric field effect diminishing the surface pinning force.
74.78.-w - Superconducting films and low-dimensional structures.
82.65.+r - Surface and interface chemistry; heterogeneous catalysis at surfaces.
68.47.Pe - Langmuir-Blodgett films on solids; polymers on surfaces; biological molecules on surfaces.
© EDP Sciences 2005