Flat bands and multi-state memory devices from chiral domain wall superlattices in magnetic Weyl semimetals

In this work, we study the electronic structure and transport in magnetic Weyl semimetal (MWSM) chiral domain wall (DW) superlattices. We show that the device conductance is strongly modulated by the number of DWs between contacts, providing a means to encode multiple resistance states in a single racetrack device. Additionally, we show that periodic exchange fields can generate tunable flat bands in the direction of transport as well as a chirality filtering mechanism for Bloch DWs. This work elucidates both the physical behavior and nanoelectronic potential for DW-MWSM devices.