Nernst effect in the vortex-liquid regime of a type-II superconductor

TL;DR

This study uses simulations based on the time-dependent Ginzburg-Landau model to analyze the Nernst effect in the vortex-liquid phase of type-II superconductors, aligning well with experimental observations.

Contribution

It demonstrates that a simple fluctuation model can capture the large Nernst effect seen in cuprate superconductors.

Findings

Quantitative agreement with experimental Nernst data

Model reproduces key features of vortex-liquid regime

Supports superconducting fluctuations as the Nernst effect origin

Abstract

We measure the transverse thermoelectric coefficient $\alpha_{xy}$ in simulations of type-II superconductors in the vortex liquid regime, using the time-dependent Ginzburg-Landau (TDGL) equation with thermal noise. Our results are in reasonably good quantitative agreement with experimental data on cuprate samples, suggesting that this simple model of superconducting fluctuations contains much of the physics behind the large Nernst effect observed in these materials.