Overscreening Diamagnetism in Cylindrical Superconductor-normal Metal-heterostructures

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2007
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Bruder, Christoph
Nazarov, Yuli V.
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Journal of Low Temperature Physics. 2007, 147, pp. 441-456. Available under: doi: 10.1007/s10909-007-9326-9
Zusammenfassung

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~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 4px becomes smaller than -3/4. This behavior can be explained by an intriguing spatial oscillation of the magnetic field in the normal layer.

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ISO 690BELZIG, Wolfgang, Christoph BRUDER, Yuli V. NAZAROV, 2007. Overscreening Diamagnetism in Cylindrical Superconductor-normal Metal-heterostructures. In: Journal of Low Temperature Physics. 2007, 147, pp. 441-456. Available under: doi: 10.1007/s10909-007-9326-9
BibTex
@article{Belzig2007Overs-8903,
  year={2007},
  doi={10.1007/s10909-007-9326-9},
  title={Overscreening Diamagnetism in Cylindrical Superconductor-normal Metal-heterostructures},
  volume={147},
  journal={Journal of Low Temperature Physics},
  pages={441--456},
  author={Belzig, Wolfgang and Bruder, Christoph and Nazarov, Yuli V.}
}
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