Symmetry and Topology in Antiferromagnetic Spintronics

Abstract

Antiferromagnetic spintronics focuses on investigating and using antiferromagnets as active elements in spintronics structures. Last decade advances in relativistic spintronics led to the discovery of the staggered, current-induced field in antiferromagnets. The corresponding Néel spin-orbit torque allowed for efficient electrical switching of antiferromagnetic moments and, in combination with electrical readout, for the demonstration of experimental antiferromagnetic memory devices. In parallel, the anomalous Hall effect was predicted and subsequently observed in antiferromagnets. A new field of spintronics based on antiferromagnets has emerged. We will focus here on the introduction into the most significant discoveries which shaped the field together with a more recent spin-off focusing on combining antiferromagnetic spintronics with topological effects, such as antiferromagnetic topological semimetals and insulators, and the interplay of antiferromagnetism, topology, and superconductivity in heterostructures. arXiv:1804.05628v1 [cond-mat.mes-hall]

Transverse Transport in Two-Dimensional Relativistic Systems with Non-Trivial Spin Textures

“…Note also that once the NHE can be analyzed separately from the overall Hall response, it could be used as a means to study the band structure and spin momentum locking based on all-electric measurements. The relation between the NHE and the crystal structure is an illustration of Neumann's principle, which dictates that the point group symmetry of a system is reflected in its physical quantities [49][50][51].…”