Berry-phase effects and electronic dynamics in noncollinear antiferromagnetic texture

Abstract

Antiferromagnets (AFMs), in contrast to ferromagnets, show a nontrivial magnetic structure with zero net magnetization. However, they share a number of spintronic effects with ferromagnets, including spin-pumping and spin transfer torques. Both phenomena stem from the coupled dynamics of free carriers and localized magnetic moments. In the present paper I study the adiabatic dynamics of a spin-polarized electrons in a metallic AFM exhibiting a noncollinear 120${}^{\circ }$ magnetic structure. I show that the slowly varying AFM spin texture produces a non-Abelian gauge potential related to the time/space gradients of the Néel vectors. Corresponding emergent electric and magnetic fields induce rotation of spin and influence the orbital dynamics of free electrons. I discuss both the possibility of a topological spin Hall effect in the vicinity of topological AFM solitons with nonzero curvature and rotation of the electron spin traveling through the AFM domain wall.

References in corpus (10)

• Spin pumping and spin-transfer torques in antiferromagnets
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Phenomenology of Current-Induced Dynamics in Antiferromagnets
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Electron Transport Driven by Nonequilibrium Magnetic Textures
• Unconventional Anomalous Hall Effect in the Metallic Triangular-Lattice Magnet PdCrO2
• Giant magnetic anisotropy of the bulk antiferromagnets IrMn and IrMn3
• Current-Induced Torques in Magnetic Metals: Beyond Spin Transfer
• Skyrmions in a Doped Antiferromagnet
• Theory of spin magnetohydrodynamics

Cited by in corpus (4)

• Prototypical topological orbital ferromagnet $\gamma$-FeMn
• Switching of a large anomalous Hall effect between metamagnetic phases of a non-collinear antiferromagnet
• Magneto-optic and transverse transport properties of non-collinear antiferromagnets
• Magnon-polaron excitations in the noncollinear antiferromagnet Mn${}_3$Ge