Interactions of Magnetic Planar Defects in Chiral Weyl Semimetals

Topological semimetals offer a unique opportunity to produce controllable magnetic states and intrinsic spin currents that are robust against backscattering from most types of disorder or defects. This is due to nominal protection offered by the topology of their electronic structure. In this work we study 2D planar defects in models of chiral crystal structures and look at the interactions between two planar defects as function of the distance between them. We use the quantum transport code Kwant with a conserved current to study the interactions between magnetic planar defects and parameters motivated from first-principle calculations of Weyl B20 compounds. Our results show that bound states can form at the planar defects and interact with each other at a given distance. Our modelled system is expansive, in that it uses parameters derived by first-principle calculations of real materials and therefore directly motivates experimental studies in such topological systems. Furthermore, our modelled system serves as a fundamental framework for novel devices with magnetic planar defects.