Enhanced Condensation Through Rotation

TL;DR

This paper proposes that rotating a thin superconducting cylinder can significantly increase its critical temperature by inducing circulating currents and magnetic effects that promote condensate formation.

Contribution

It introduces a novel mechanism where rotation enhances superconductivity by decoupling Cooper pairs from rotation, supported by quantitative estimates for aluminum cylinders.

Findings

Rotation increases the critical temperature of superconductors.

Circulating currents and magnetic interactions facilitate condensate formation.

Quantitative estimates demonstrate the effect in aluminum cylinders.

Abstract

We argue that rotation of a thin superconducting cylinder can increase the critical superconducting temperature substantially. A purely rotational effect originates from the tendency of a steadily rotating mechanical system to maximize its moment of inertia. A condensation of Cooper pairs in a rotating cylinder decouples a part of the normal electron fraction from rotation, thus producing a circulating electric current of an uncompensated electric charge of lattice ions. The current produces the magnetic field that stores energy of rotation, thus increasing the moment of inertia. In the presence of an external magnetic field, another enhancement effect originates from the interaction energy of the dipole magnetic moment of the normal component with the background magnetic field. In both cases, rotation of the cylindrical shell promotes the formation of condensate that decouples from mechanical rotation. We give quantitative estimates for a thin cylinder of aluminum.