Hall voltage sign reversal in type II superconductors

TL;DR

This paper presents a model explaining the Hall voltage sign reversal in type II superconductors by considering vortices with different charge carriers as interacting subsystems, leading to a new formula that aligns qualitatively with experimental data.

Contribution

It introduces a novel model treating vortices as three interacting subsystems, resulting in a new formula for Hall resistivity that explains sign reversal.

Findings

The model qualitatively explains experimental Hall sign reversal.

A new formula for Hall resistivity is derived.

Vortices with different charge carriers are key to understanding the phenomenon.

Abstract

The Hall voltage sign reversal is consistently explained by the model in which vortices with the superconducting and normal state charge carriers are regarded as three subsystems mutually connected by interactions. The equations of motion for these three subsystems are solved simultaneously and a new formula for the Hall resistivity is obtained. It is shown that it is possible to explain qualitatively experimental data by this model.