Conductance oscillations of antiferromagnetic layer tunnel junctions

Abstract

We study conductance oscillations in antiferromagnetic layer tunnel junctions made from antiferromagnetic topological insulators such as MnBi2Te4. In an in-plane magnetic field, the two-terminal differential conductance oscillates with field strength. Even- and odd-layer junctions show distinct weak-field interference because of a scattering phase shift of π, and the oscillations evolve from SQUID-like to Fraunhofer-like as the junction length increases.