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Macroscopic Aharonov--Bohm Effect in Type-I Superconductors

Catrin Ellenberger·Florian Gebhard·Wolfgang Bestgen
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Abstract

In type-I superconducting cylinders bulk superconductivity is destroyed above the first critical current. Below the second critical current the `type-I mixed state' displays fluctuation superconductivity which contributes to the total current. A magnetic flux on the axis of the cylinder can change the second critical current by as much as 50 percent so that half a flux quantum can switch the cylinder from normal conduction to superconductivity: the Aharonov--Bohm effect manifests itself in macroscopically large resistance changes of the cylinder.

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Catrin Ellenberger, Florian Gebhard, Wolfgang Bestgen. 2005-01-26. Macroscopic Aharonov--Bohm Effect in Type-I Superconductors. https://doi.org/10.1209/epl%2Fi2004-10369-0

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