Magnetic precession induced spin accumulation in collinear antiferromagnets

Abstract

Generating and characterizing uniform and staggered spin polarization in antiferromagnets is one of the key challenges for antiferromagnetic spintronic technology. Here, we perform perturbative theory, group-theoretical symmetry analysis, low energy and ab initio simulations to propose that the magnetic precession near the equilibrium magnetic axis could generate finite uniform and staggered spin polarization at the opposite magnetic sublattices (referring to total magnetic and Néel vector generation) in a single AFM semiconductors. This response does not require the heterojunction setup and could eliminate the lattice mismatch issues at the junction. Through scrutinizing all symmetrically-protected vanishing magnetic moment groups and especially focusing on parity-time (PT ) invariant groups, we identify the symmetry constraints that describe the staggered spin accumulation responses, and disclose their fieldlike and dampinglike characters. This unravels a hidden spin accumulation mode in AFM semiconductors. Furthermore, we simulate such an effect using a perturbative approach and suggest that electric gate field and Floquet light-dressing can effectively manipulate these responses.

4 figures, PRB in press

References in corpus (21)

• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Spin pumping and spin-transfer torques in antiferromagnets
• Subterahertz spin pumping from an insulating antiferromagnet
• Spin-Orbit Coupling and Ion Displacements in Multiferroic TbMnO3
• Electric control of Dirac quasiparticles by spin-orbit torque in an antiferromagnet
• Theory of Current-Induced Angular Momentum Transfer Dynamics in Spin-Orbit Coupled Systems
• Ballistic and shift currents in the bulk photovoltaic effect theory
• Spin Pumping of an Easy-Plane Antiferromagnet Enhanced by Dzyaloshinskii-Moriya Interaction
• Spin-orbit torques in L1${}_0$-FePt/Pt thin films driven by electrical and thermal currents
• Bulk Rashba Effect in Multiferroics: a theoretical prediction for BiCoO3
• Light-induced topological phase transition with tunable layer Hall effect in axion antiferromagnets
• Electrical switching of altermagnetism
• Orbital Pumping Incorporating Both Orbital Angular Momentum and Position
• Quantifying Spin-Orbit Torques in Antiferromagnet/Heavy Metal Heterostructures
• Valley contrasting bulk photovoltaic effect in antiferromagnetic MnPSe${}_3$ monolayer
• Contrasting Light-Induced Spin Torque in Antiferromagnetic and Altermagnetic Systems
• Out-of-plane Edelstein effects: Electric-field induced magnetization in $p$-wave magnets
• Valley-dependent giant orbital moments and transport feature in rhombohedral graphene multilayers
• Spin-orbit torque switching of Néel order in band-inverted antiferromagnetic bilayer MnBi${}_2$Te${}_4$