Aharonov-Bohm effect in superconducting LOFF state

TL;DR

This paper investigates Aharonov-Bohm oscillations in the transition temperature, paraconductivity, and specific heat of a thin superconducting ring in the inhomogeneous LOFF state, revealing flux-induced critical temperature increase and double peak oscillations.

Contribution

It demonstrates how magnetic flux affects the LOFF superconducting state, showing unique AB oscillation features not present in uniform superconductors.

Findings

Magnetic flux can increase the critical temperature of the LOFF state.

Double peak structure in AB oscillations indicates degeneracy of inhomogeneous superconducting states.

Flux influences thermodynamic properties like specific heat and paraconductivity in the LOFF regime.

Abstract

We study AB oscillations of transition temperature, paraconductivity and specific heat of thin ring in the regime of inhomogeneous Larkin - Ovchinnikov - Fulde - Ferrell superconducting state. We found that in contrast to uniform superconductivity magnetic flux might increase the critical temperature of LOFF state. Degeneracy of the inhomogeneous superconducting state reveals in double peak structure of AB oscillations.