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

TL;DR

This paper investigates the rotational behavior of superconductors cooled in a magnetic field, revealing potential conflicts with conventional theory and proposing the hole superconductivity theory as a consistent explanation.

Contribution

It highlights a gap in conventional superconductivity theory regarding field-cooling experiments and advocates for the hole superconductivity theory as a resolution.

Findings

Conventional theory does not predict the correct angular momentum behavior during field cooling.

Hole superconductivity theory aligns with physical laws in this context.

Experimental implications challenge existing understanding of superconductor physics.

Abstract

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.