Nature of the vortex-glass order in strongly type-II superconductors

TL;DR

This study uses Monte Carlo simulations on a lattice XY model to demonstrate the existence of stable vortex-glass order in three-dimensional, strongly type-II superconductors with point disorder, analyzing its critical properties.

Contribution

It provides the first evidence of stable vortex-glass order in the unscreened limit and compares critical exponents with the gauge-glass model.

Findings

Stable vortex-glass order confirmed in the unscreened limit

Critical exponents estimated and compared with gauge-glass model

Supports the existence of vortex-glass phase in type-II superconductors

Abstract

The stability and the critical properties of the three-dimensional vortex-glass order in random type-II superconductors with point disorder is investigated in the unscreened limit based on a lattice {\it XY} model with a uniform field. By performing equilibrium Monte Carlo simulations for the system with periodic boundary conditions, the existence of a stable vortex-glass order is established in the unscreened limit. Estimated critical exponents are compared with those of the gauge-glass model.