Observation of paramagnetic supercurrent in mesoscopic superconducting rings and disks using multiple-small-tunnel-junction method
Faculty of Sciences. Physics
Singapore :World Scientific, 2005
Realizing controllable quantum states : proceedings of the 3rd International Symposium on Mesoscopic Superconductivity and Spintronics, March 1-4, 2004, Atsugi City, Japan
University of Antwerp
Responses of mesoscopic superconducting rings and disks to perpendicular magnetic fields are studied by using the multiple-small-tunnel-junction method, in which transport properties of several small tunnel junctions attached to the sample are measured simultaneously. This allows us for a direct experimental observation of the paramagnetic supercurrent, which is closely related to the paramagnetic Meissner effect. The results are compared with numerical results based on the nonlinear Ginzburg-Landau theory.