All-in-all-out magnetic domain wall conduction in a pyrochlore iridate heterointerface

Abstract

Metallic surface states emerging at all-in-all-out type antiferromagnetic domain walls in bulk pyrochlore iridates have recently been observed. Such bulk crystals, however, inevitably contain huge amounts of the domains at random, and so it is quite challenging to investigate and utilize these novel surface conducting states. The results presented here are for a pyrochlore iridate heterointerface, which is realized by an advanced thin film growth technique. The authors successfully demonstrate the detection and control of a surface state linked to the antiferromagnetic domain wall, guiding further efforts for utilizing such states for surface transport in electronics and spintronics applications as well as for investigating the emergent topological transport at the interface.