Manifestation of the magnetic moments of Cooper pairs in low-temperature properties of superconducting thin-film rings

TL;DR

This paper proposes that the intrinsic magnetic moments of Cooper pairs in cuprate superconductors can be experimentally detected through low-temperature measurements of superconducting thin-film rings, revealing insights into pairing symmetry.

Contribution

It introduces a method to detect the magnetic moments of Cooper pairs via low-temperature properties of superconducting rings, linking magnetic field effects to pairing symmetry in cuprates.

Findings

Magnetic field from supercurrent can order Cooper pair magnetic moments.

Changes in supercurrent and magnetic induction reveal magnetic moments.

Low-temperature behaviors allow extraction of Cooper pair magnetic moments.

Abstract

Experimental determination of the magnetic moment of the Cooper pairs can shed light on the pairing symmetry in cuprates. We argue that the intrinsic magnetic moments of the Cooper pairs can be detected in experiments with superconducting thin-film rings. At sufficiently low temperatures the magnetic field generated by the supercurrent, can cause the ordering of these magnetic moments that produces changes in the supercurrent and magnetic induction distributions, the heat capacity and magnetic moment of the ring. It is shown that the intrinsic magnetic moment of the Cooper pairs can be extracted from low-temperature behaviours of these measurable quantities of the current-carrying rings made of the cuprate superconductors.