Overscreening Diamagnetism in Cylindrical Superconductor-Normal Metal-Heterostructures
Superconductivity
2015-06-25 v1
Abstract
We study the linear diamagnetic response of a superconducting cylinder coated by a normal-metal layer due to the proximity effect using the clean limit quasiclassical Eilenberger equations. We compare the results for the susceptibility with those for a planar geometry. Interestingly, for the cylinder exhibits a stronger overscreening of the magnetic field, i.e., at the interface to the superconductor it can be less than (-1/2) of the applied field. Even for , the diamagnetism can be increased as compared to the planar case, viz. the magnetic susceptibility becomes smaller than -3/4. This behaviour can be explained by an intriguing spatial oscillation of the magnetic field in the normal layer.
Keywords
Cite
@article{arxiv.cond-mat/0609610,
title = {Overscreening Diamagnetism in Cylindrical Superconductor-Normal Metal-Heterostructures},
author = {W. Belzig and C. Bruder and Yu. V. Nazarov},
journal= {arXiv preprint arXiv:cond-mat/0609610},
year = {2015}
}