Novel results about magnetic fluctuation effects near the normal-to-superconducting phase transition in a zero magnetic field

TL;DR

This paper investigates how magnetic fluctuations influence the normal-to-superconducting phase transition in zero magnetic field, providing new theoretical insights and numerical results for bulk and thin aluminum films.

Contribution

It offers a systematic theoretical analysis within the Ginzburg-Landau framework, including new results specifically for thin superconducting films.

Findings

Numerical evaluation of order parameter jump, latent heat, and specific heat for Al films.

Theoretical predictions suggest possible experimental verification.

Analysis within a self-consistent approximation and quasi-macroscopic model.

Abstract

A systematic treatment of the magnetic fluctuations effect on the properties of the normal-to-superconducting phase transition in a zero external magnetic field is given within the self-consistent approximation and the quasi-macroscopic Ginzburg-Landau model. New results for thin superconducting films are presented. Thermodynamic quantities having a direct experimental interest as the order parameter jump, latent heat, and specific heat are considered and numerically evaluated for bulk Al and thin Al films. The possibility for an experimental verification of the theoretical predictions is discussed.