Tunable artificial topological Hall effects in van der Waals heterointerfaces

Abstract

Multichannel transport may mask the intrinsic topological Hall effects and give rise to artificial topological Hall effects in van der Waals heterointerfaces. Here, the authors systematically investigate the multichannel transport in van der Waals ferromagnetic-ferromagnetic and ferromagnetic-metal heterostructures. Interestingly, both positive and negative topological Hall effects can be mimicked. The observations have been made with a proven lack of relation to chiral spin textures and are attributed to multichannel Hall effects occurring at the heterointerfaces.