Dynamics of driven vortex-antivortex matter in superconducting films with a magnetic dipole array

TL;DR

This paper models the complex dynamics of vortex-antivortex pairs in superconducting films with magnetic dipole arrays, revealing how current influences their creation, annihilation, and guided motion, affecting transport properties.

Contribution

It introduces a theoretical model incorporating pair creation and guided vortex-antivortex motion in superconducting films with magnetic dipoles, advancing understanding of their transport behavior.

Findings

Vortex-antivortex dynamics depend strongly on current intensity and direction.

Creation and annihilation processes influence electrical field time dependence.

Guided vortex-antivortex motion results in zero-field transverse resistance.

Abstract

We investigate theoretically vortex-antivortex (v-av) matter moving in thin superconducting films with a regular array of in-plane magnetic dipoles. Our model considers v-av pair creation induced by the local current density generated by the magnetic texture and the transport current and simulates the dynamics of vortices and antivortices by numerical integration of the Langevin equation of motion. Calculations of the transport properties at zero applied field show a strong dependence of the v-av dynamics on the current intensity and direction. The dynamics of the v-av matter is characterized by a series of creation and annihilation processes, which reflect on the time dependence of the electrical field, and by guided motion, resulting in a zero-field transverse resistance.