Giant and tunneling magnetoresistance effects from anisotropic and valley-dependent spin-momentum interactions in antiferromagnets

Abstract

Giant or tunneling magnetoresistance are physical phenomena used for reading information in commercial spintronic devices. The effects rely on a conserved spin current passing between a reference and a sensing ferromagnetic electrode in a multilayer structure. Recently, we have proposed that these fundamental spintronic effects can be realized in collinear antiferromagnets with staggered spin-momentum exchange interaction, which generates conserved spin currents in the absence of a net equilibrium magnetization. Here we elaborate on the proposal by presenting archetype model mechanisms for the antiferromagnetic giant and tunneling magnetoresistance effects. The models are based, respectively, on anisotropic and valley-dependent forms of the non-relativistic staggered spin-momentum interaction. Using first principles calculations we link these model mechanisms to real antiferromagnetic materials and predict a $\sim$100\% scale for the effects. We point out that besides the GMR/TMR detection, our models directly imply the possibility of spin-transfer-torques excitation of the antiferromagnets.

6 pages, 4 figures

References in corpus (12)

• Spin Transfer Torques
• Efficient Electrical Spin-Splitter Based on Non-Relativistic Collinear Antiferromagnetism
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Antiferromagnetism in RuO${}_2$ as $d$-wave Pomeranchuk instability
• Bottom-up design of spin-split and reshaped electronic band structures in spin-orbit-coupling free antiferromagnets: Procedure on the basis of augmented multipoles
• Spin-orbit coupling induced anisotropy effects in bimetallic antiferromagnets: A route towards antiferromagnetic spintronics
• Prediction of low-Z collinear and noncollinear antiferromagnetic compounds having momentum-dependent spin splitting even without spin-orbit coupling
• Electric control of Dirac quasiparticles by spin-orbit torque in an antiferromagnet
• High performance Wannier interpolation of Berry curvature and related quantities: WannierBerri code
• Perovskite as a spin current generator
• Perspective on Metallic Antiferromagnets
• Spin Transfer Torque in Antiferromagnetic Spin-Valves: From Clean to Disordered Regimes

Cited by in corpus (186)

• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
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• Spontaneous anomalous Hall effect arising from an unconventional compensated magnetic phase in a semiconductor
• Observation of plaid-like spin splitting in a noncoplanar antiferromagnet
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• Large band-splitting in $g$-wave type altermagnet CrSb
• Topological Superconductivity in Two-Dimensional Altermagnetic Metals
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• X-ray Magnetic Circular Dichroism in Altermagnetic $\alpha$-MnTe
• Absence of altermagnetic spin splitting character in rutile oxide RuO${}_2$
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• Room temperature two-dimensional antiferromagnetic Weyl semimetal CrO with giant spin-splitting and spin-momentum locked transport
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