Boson Mapping and Nonlinear Response of Type-II Superconductors

TL;DR

This paper models vortices in high-Tc superconductors as charged bosons in 2D, deriving a nonlinear voltage response that aligns with experimental data, providing insights into vortex dynamics and dissipation effects.

Contribution

It introduces a novel numerical approach using boson mapping and Monte Carlo simulations to analyze vortex behavior and nonlinear responses in high-Tc superconductors.

Findings

Derived a nonlinear voltage response expression matching experiments

Mapped vortex dynamics to charged bosons in 2D for numerical analysis

Identified regimes and crossover behaviors in vortex response

Abstract

The vortices in a high-Tc superconductor with strong correlated pinning centers have been studied numerically using the mapping to charged bosons in two-dimensions(2D) and the Monte-Carlo algorithm. Considering the viscous dissipation of moving vortices we derived a nonlinear voltage response expression which describes different regimes and their crossover uniformly. This equation accords with experimental results.