Mismatch Induced Type Transition of a Superconductor

TL;DR

This paper investigates how inhomogeneities and magnetic fields can induce a transition from type I to type II superconductivity using Ginzburg-Landau theory, highlighting the critical mismatch value and fluctuation effects.

Contribution

It introduces the concept of mismatch-induced type transition in superconductors and quantifies the critical mismatch and fluctuation contributions within the Ginzburg-Landau framework.

Findings

Transition from type I to type II superconductivity due to mismatch.

Calculated critical mismatch value for the transition.

Estimated fluctuation and higher order term contributions.

Abstract

We use the Ginzburg-Landau theory near the transition temperature in order to examine the behavior of an inhomogeneous superconductor in the presence of a magnetic field. We find that a transition from type I to type II superconductivity occurs. Furthermore we calculate the critical value of the mismatch and estimate the contributions of the fluctuations of the condensate and the higher order terms in the Ginzburg-Landau framework.