Relativistic Néel-Order Fields Induced by Electrical Current in Antiferromagnets
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractWe predict that a lateral electrical current in antiferromagnets can induce nonequilibrium Néel-order fields, i.e., fields whose sign alternates between the spin sublattices, which can trigger ultrafast spin-axis reorientation. Based on microscopic transport theory calculations we identify staggered current-induced fields analogous to the intraband and to the intrinsic interband spin-orbit fields previously reported in ferromagnets with a broken inversion-symmetry crystal. To illustrate their rich physics and utility, we consider bulk Mn2Au with the two spin sublattices forming inversion partners, and a 2D square-lattice antiferromagnet with broken structural inversion symmetry modeled by a Rashba spin-orbit coupling. We propose an antiferromagnetic memory device with electrical writing and reading.
CitationRelativistic Néel-Order Fields Induced by Electrical Current in Antiferromagnets 2014, 113 (15) Physical Review Letters
PublisherAmerican Physical Society (APS)
JournalPhysical Review Letters