Strong vortex-antivortex fluctuations in the type II superconducting film

TL;DR

This paper investigates vortex-antivortex pair fluctuations in type II superconducting films, demonstrating their significant impact on heat capacity across a broad temperature range below the critical temperature.

Contribution

It provides a theoretical analysis of vortex-antivortex pair proliferation and quantifies their contribution to free energy and heat capacity in superconducting films.

Findings

Vortex-antivortex fluctuations dominate heat capacity near Tc.

Fluctuations are significant at low temperatures.

Proliferation affects thermodynamic properties of the film.

Abstract

The small size vortex-antivortex pairs proliferation in type II superconducting film is considered for the wide interval of temperatures below Tc. The corresponding contribution to free energy is calculated. It is shown that these fluctuations give the main contribution to the heat capacity of the film both at low temperatures and in the vicinity of transition.