Overscreening diamagnetism in cylindrical superconductor-normal metal-heterostructures

Belzig, W. and Bruder, C. and Nazarov, Yu. V.. (2007) Overscreening diamagnetism in cylindrical superconductor-normal metal-heterostructures. Journal of low temperature physics, Vol. 147, H. 3-4. pp. 441-456.

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Official URL: http://edoc.unibas.ch/dok/A5252824

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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 R similar to d 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 R << d, the diamagnetism can be increased as compared to the planar case, viz. the magnetic susceptibility 4 pi chi becomes smaller than -3/4. This behavior can be explained by an intriguing spatial oscillation of the magnetic field in the normal layer.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Plenum Press
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:27
Deposited On:22 Mar 2012 13:56

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