Dependence of Vortex States in Superconductors on a Chiral Helimagnet and an Applied Magnetic Field

TL;DR

This study investigates how a chiral helimagnet influences vortex arrangements in superconductors, revealing a periodically modulated vortex lattice and potential for increased critical current due to vortex pinning.

Contribution

It demonstrates the formation of a modulated vortex lattice caused by the chiral helimagnet's oscillating magnetic field using Ginzburg-Landau equations.

Findings

Vortices form a periodically modulated triangular lattice.

Magnetic field oscillations from CHM influence vortex arrangement.

Potential increase in critical current due to vortex pinning.

Abstract

We study effects of a chiral helimagnet (CHM) on vortex states in a superconductor, solving the Ginzburg-Landau equations in a chiral helimagnet/superconductor bilayer system. We found that vortices form a periodically modulated triangular lattice, because the magnetic field from the chiral helimagnet $H_{CHM}$ oscillates spatially. An increase of a critical current is expected, because vortices are pinned by the $H_{CHM}$.