Do superconductors violate Lenz's law? Body rotation under field cooling and theoretical implications

Details Do superconductors violate Lenz's law? Body rotation under field cooling and theoretical implications Do superconductors violate Lenz's law? Body rotation under field cooling and theoretical implications

2006-08-22

arxiv.org/abs/cond-mat/0608492v2

Phys.Lett. A366, 615 (2007)

Physics

Condensed Matter

Superconductivity

to be published in Phys.Lett.A

Scientific paper

10.1016/j.physleta.2007.03.017

When a magnetic field is turned on, a superconducting body acquires an angular momentum in direction opposite to the applied field. This gyromagnetic effect has been established experimentally and is understood theoretically. However, the corresponding situation when a superconductor is cooled in a pre-existent field has not been examined. We argue that the conventional theory of superconductivity does not provide a prediction for the outcome of that experiment that does not violate fundamental laws of physics, either Lenz's law or conservation of angular momentum. The theory of hole superconductivity predicts an outcome of this experiment consistent with the laws of physics.

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