Topological coupling of dislocations and magnetization vorticity in Spin Density Waves

TL;DR

This paper explores the topological properties of Spin Density Waves, revealing complex dislocations coupled with magnetization vortices that influence electronic noise characteristics.

Contribution

It introduces a novel topological object combining dislocations and magnetization vortices in Spin Density Waves, highlighting their energetic favorability and impact on noise.

Findings

Half-integer dislocations coupled with semi-vortices identified

Generation of these objects alters narrow band noise frequency

Enhanced Coulomb interactions favor these topological defects

Abstract

The rich order parameter of Spin Density Waves allows for an unusual object of a complex topological nature: a half-integer dislocation combined with a semi-vortex of the staggered magnetization. It becomes energetically preferable to ordinary dislocation due to enhanced Coulomb interactions in the semiconducting regime. Generation of these objects changes the narrow band noise frequency.