Effect of interlayer interaction on magnon properties of vdW honeycomb heterostructures

Interlayer interactions in bilayer or multilayer electron systems have been studied extensively, and many exotic physical phenomena have been revealed. However, systematic investigations of the impact of interlayer interactions on magnonic physics are very few. Here, we use a van der Waals (vdW) honeycomb heterostructure as a platform to investigate the modulation of magnon properties in honeycomb AA- and AB-stacking heterostructures with ferromagnetic and antiferromagnetic interlayer interactions, including topological phases and thermal Hall conductivity. Our results reveal that interlayer interactions play a crucial role in modulating the magnonic topology and Hall transport properties of magnetic heterostructures, with potential for experimental realization.