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 (8)

• Spin Transfer Torques
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Antiferromagnetism in RuO${}_2$ as $d$-wave Pomeranchuk instability
• Spin-orbit coupling induced anisotropy effects in bimetallic antiferromagnets: A route towards antiferromagnetic spintronics
• Electric control of Dirac quasiparticles by spin-orbit torque in an antiferromagnet
• 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 (185)

• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Observation of spin splitting torque in a collinear antiferromagnet RuO2
• Broken Kramers' degeneracy in altermagnetic MnTe
• Spontaneous anomalous Hall effect arising from an unconventional compensated magnetic phase in a semiconductor
• Observation of plaid-like spin splitting in a noncoplanar antiferromagnet
• Crystal Thermal Transport in Altermagnetic RuO2
• Large band-splitting in $g$-wave type altermagnet CrSb
• Topological Superconductivity in Two-Dimensional Altermagnetic Metals
• Antiferroelectric Altermagnets: Antiferroelectricity Alters Magnets
• Enumeration and representation theory of spin space groups
• Ferroelectric switchable altermagnetism
• Landau Theory of Altermagnetism
• X-ray Magnetic Circular Dichroism in Altermagnetic $\alpha$-MnTe
• Absence of altermagnetic spin splitting character in rutile oxide RuO${}_2$
• Magnetic octupoles as the order parameter for unconventional antiferromagnetism
• Andreev reflection at the altermagnet-superconductor interface
• Two-dimensional altermagnets: Superconductivity in a minimal microscopic model
• Predictable gate-field control of spin in altermagnets with spin-layer coupling
• Phase-shifted Andreev levels in an altermagnet Josephson junction
• Néel Spin Currents in Antiferromagnets
• Minimal Models for Altermagnetism
• Spontaneous Formation of Altermagnetism from Orbital Ordering
• Anisotropy of the anomalous Hall effect in the altermagnet candidate Mn${}_5$Si${}_3$ films
• Description of two-dimensional altermagnetism: Categorization using spin group theory
• Room temperature two-dimensional antiferromagnetic Weyl semimetal CrO with giant spin-splitting and spin-momentum locked transport
• Minimal Models and Transport Properties of Unconventional $p$-Wave Magnets
• Realizing Altermagnetism in Fermi-Hubbard Models with Ultracold Atoms
• Bilayer stacking A-type altermagnet: A general approach to generating two-dimensional altermagnetism
• AI-driven inverse design of materials: Past, present and future
• Crystal facet orientated Altermagnets for detecting ferromagnetic and antiferromagnetic states by giant tunneling magnetoresistance effect
• Non-relativistic spin splitting in compensated magnets that are not altermagnets
• Tunneling magnetoresistance in magnetic tunnel junctions with a single ferromagnetic electrode
• AI-accelerated Discovery of Altermagnetic Materials
• Altermagnetism and magnetic groups with pseudoscalar electron spin
• Superconducting phenomena in systems with unconventional magnets
• Orientation-dependent Josephson effect in spin-singlet superconductor/altermagnet/spin-triplet superconductor junctions
• $\phi$ Josephson junction induced by altermagnetism
• Superconductor-altermagnet memory functionality without stray fields
• Field-free Josephson diode effect in altermagnet/normal metal/altermagnet junctions
• Tunable band topology and optical conductivity in altermagnets
• Theory of Tunneling Spectroscopy in Unconventional $p$-wave Magnet-Superconductor Hybrid Structures
• Josephson effect and odd-frequency pairing in superconducting junctions with unconventional magnets
• Coulomb Drag in Altermagnets
• Orbital-selective altermagnetism and correlation-enhanced spin-splitting in transition metal oxides
• Transport across junctions of altermagnets with normal metals and ferromagnets
• Robust spin-transfer torque and magnetoresistance in non-collinear antiferromagnetic junctions
• Tunable second harmornic in altermagnetic Josephson junctions
• Symmetry analysis with spin crystallographic groups: Disentangling effects free of spin-orbit coupling in emergent electromagnetism
• Strain-induced valley polarization, topological states, and piezomagnetism in two-dimensional altermagnetic V${}_2$Te${}_2$O, V${}_2$STeO, V${}_2$SSeO, and V${}_2$S${}_2$O
• Quasiclassical theory of superconducting spin-splitter effects and spin-filtering via altermagnets
• Staggered Dzyaloshinskii-Moriya inducing weak ferromagnetism in centrosymmetric altermagnets and weak ferrimagnetism in noncentrosymmetric altermagnets
• Crossed Andreev reflection in altermagnets
• Crystal valley Hall effect
• Classification of pair symmetries in superconductors with unconventional magnetism
• X-ray Magnetic Circular Dichroism in RuO${}_2$
• Spin-Neutral Tunneling Anomalous Hall Effect
• Impurity-induced Friedel oscillations in altermagnets and $p$-wave magnets
• Interplay of altermagnetism and pressure in hexagonal and orthorhombic MnTe
• Altermagnetic phase transition in a Lieb metal
• Anisotropic spin filtering by an altermagnetic barrier in magnetic tunnel junctions
• Design of altermagnetic models from spin clusters
• Nonlinear Superconducting Magnetoelectric Effect
• Spontaneous Crystal Thermal Hall Effect in Insulating Altermagnets
• G-type Antiferromagnetic BiFeO${}_3$ is a Multiferroic $g$-wave Altermagnet
• Altermagnetic variants in thin films of Mn5Si3
• Spin Splitting Nernst Effect in Altermagnet
• Altermagnetic splitting of magnons in hematite ($\alpha$-Fe${}_2$O${}_3$)
• X-type stacking in cross-chain antiferromagnets
• Spin Chern number in altermagnets
• Anisotropic light-tailored RKKY interaction in two-dimensional $d$-wave altermagnets
• Interface-induced magnetization in altermagnets and antiferromagnets
• Quasi-one-dimensional spin transport in altermagnetic $Z^3$ nodal net metals
• Nonrelativistic and nonmagnetic control of terahertz charge currents via electrical anisotropy in RuO2 and IrO2
• Crossed Andreev reflection in collinear $p$-wave magnet/triplet superconductor junctions
• Tunneling Magnetoresistance Effect in Altermagnets
• Multiferroic collinear antiferromagnet with hidden altermagnetic split
• Anisotropic spin-polarized conductivity in collinear altermagnets
• Transverse Spin current at the normal/p-wave magnet junctions
• Suppressed Kondo screening in two-dimensional altermagnets
• Strain controlled g- to d-wave transition in altermagnetic CrSb
• Interplay of Altermagnetic Order and Wilson Mass in the Dirac Equation: Helical Edge States without Time-Reversal Symmetry
• Group Theory on Quasisymmetry and Protected Near Degeneracy
• Transition from antiferromagnets to altermagnets: Symmetry-Breaking Theory
• Intra-unit-cell singlet pairing mediated by altermagnetic fluctuations
• Floquet engineering spin triplet states in unconventional magnets
• Origin of $A$-type antiferromagnetism and chiral split magnons in altermagnetic $\alpha$-MnTe
• Impurity states in altermagnetic superconductors
• Field-sensitive dislocation bound states in two-dimensional $d$-wave altermagnets
• Floating Edge Bands in the Bernevig-Hughes-Zhang model with Altermagnetism
• Origin of Anomalous Hall effect in Cr-doped RuO${}_2$
• Pseudo-Ising superconductivity induced by $p$-wave magnetism
• Diagnosing Altermagnetic Phases through Quantum Oscillations
• Andreev bound states and supercurrent in an unconventional superconductor-altermagnetic Josephson junction
• Fingerprint of Non-Hermiticity in d-wave Altermagnet
• Multi-component altermagnet: A general approach to generating multi-component structures with two-dimensional altermagnetism
• Light-induced Odd-parity Magnetism in Conventional Collinear Antiferromagnets
• Exploring d-Wave Magnetism in Cuprates from Oxygen Moments
• Tunable Josephson diode effect in singlet superconductor-altermagnet-triplet superconductor junctions
• Dominant orbital magnetization in the prototypical altermagnet MnTe
• Quasiparticle interference in altermagnets
• First-principles study on tunnel magnetoresistance effect with Cr-doped RuO${}_2$ electrode
• Altermagnetic Flatband-Driven Fermi Surface Geometry for Giant Tunneling Magnetoresistance
• Light-induced Floquet spin-triplet Cooper pairs in unconventional magnets
• Two-Dimensional Altermagnetic Iron Oxyhalides: Real Chern Topology and Valley-Spin-Lattice Coupling
• Ferroelectric Antiferromagnetic Lifting of Spin-Valley Degeneracy
• Tunneling conductance in superconducting junctions with $p$-wave unconventional magnets breaking time-reversal symmetry
• Spin relaxation and transport behaviors in altermagnetic systems
• Nonlinear Piezomagnetic Effects in $g$-wave Altermagnets
• Local density of states as a probe for tunneling magnetoresistance effect: application to ferrimagnetic tunnel junctions
• A Theory of Anisotropic Magnetoresistance in Altermagnets and Its Applications
• Altermagnetic Weyl node-network semimetals protected by spin symmetry
• Real Chern insulators in two-dimensional altermagnetic Fe${}_2$S${}_2$O and Fe${}_2$Se${}_2$O
• Ultrafast electron dynamics in altermagnetic materials
• Inversion-asymmetric itinerant antiferromagnets by the space group symmetry
• Designing Non-Relativistic Spin Splitting in Oxide Perovskites
• Dual-Switch Control of a Layer-Locked Anomalous Valley Hall Effect in a Sliding Ferroelectric Antiferromagnet
• Energy Dispersion, Superconductivity and Magnetic Fluctuations in Stacked Altermagnetism Materials
• Nonlocal damping of spin waves in a magnetic insulator induced by normal, heavy, or altermagnetic metallic overlayer: A Schwinger-Keldysh field theory approach
• Electric and spin current vortices in altermagnets
• Helical Fermi Arc in Altermagnetic Weyl Semimetal
• Unconventional compensated magnetic material LaMn${}_2$SbO${}_6$
• The emergence of net chirality in two-dimensional Dirac fermions system with altermagnetic mass
• Current-controlled chirality dynamics in a mesoscopic magnetic domain wall
• Cavity-induced coherent magnetization and polaritons in altermagnets
• Valley-dependent electronic properties in two-dimensional altermagnetic iron-based transition metal chalcogenides
• Epitaxial growth and transport properties of a metallic altermagnet CrSb on a GaAs (001) substrate
• Relativistic Spin-momentum locking in altermagnets
• Tunneling spin Hall effect induced by unconventional $p$-wave magnetism
• Altermagnetism, ARPES, symmetry, non-relativistic band splitting
• Achieving Altermagnetism in Monolayer Holey Graphyne via Atomic Manipulation
• Symmetry-controlled SrRuO3/SrTiO3/SrRuO3 magnetic tunnel junctions:Spin polarization and its relevance to tunneling magnetoresistance
• Unlocking Doping Effects on Altermagnetism in MnTe: Emergence of Quasi-altermagnetism
• Emerging new phases in correlated Mott insulator Ca2RuO4
• Odd-Parity Magnetism in Fe-Based Superconductors
• Viscoelastic tensor and hydrodynamics of altermagnets
• $d$-Wave Polarization-Spin Locking in Two-Dimensional Altermagnets
• Odd-parity altermagnetism through sublattice currents: From Haldane-Hubbard model to general bipartite lattices
• Two-Terminal Electrical Detection of the Néel Vector via Longitudinal Antiferromagnetic Nonreciprocal Transport
• Approximate half-integer quantization in anomalous planar transport in $d$-wave altermagnets
• Electrical Control of the Exchange Bias Effect at Model Ferromagnet-Altermagnet Junctions
• Zeeman-type spin splittings in strained d-wave altermagnets
• Dirac edge states as signature of two-dimensional altermagnetic topological crystalline phase
• The odd-parity altermagnetism: A spin group study
• Orientation dependent anomalous Hall and spin Hall currents at junctions of altermagnets with $p$-wave magnets
• Incommensuration in odd-parity antiferromagnets
• Approaches to tunnel magnetoresistance effect with antiferromagnets
• Marginal Metals and Kosterlitz-Thouless Type Phase Transition in Disordered Altermagnets
• Projectively implemented altermagnetism in an exactly solvable quantum spin liquid
• Finite-momentum mixed singlet-triplet pairing in chiral antiferromagnets induced by even-parity spin texture
• Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
• Floquet-Engineering Weyl Points and Linked Fermi Arcs from Straight Nodal Lines
• Spin Currents in Rashba Altermagnets: From Equilibrium to Nonlinear Regimes
• Fermi liquid theory of $d$-wave altermagnets: demon modes and Fano-demon states
• Rational Control of Magnonic and Electronic Band Splittings
• Multipole analysis of spin currents in altermagnetic MnTe
• Effect of symmetry breaking on altermagnetism in CrSb and Formation of fragmented nodal curves
• Bipolarized Weyl semimetals and quantum crystal valley Hall effect in two-dimensional altermagnetic materials
• Analysis of Spin Current Generation by Elastic Waves in $f$-wave Altermagnets
• Moiré spintronics: Emergent phenomena, material realization and machine learning accelerating discovery
• Néel vector controlled charge and spin transport in altermagnetic junctions
• Interplay between Superconductivity and Altermagnetism in Disordered Materials and Heterostructures
• Non-Hermitian higher-order topological insulators enabled by altermagnet engineering
• Ultrafast Magneto-optical Fingerprints of Altermagnetism in MnTe
• Higher-order topological insulators in two-dimensional antiferromagnetic and altermagnetic chromium-based group-IV chalcogenides
• Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface
• Nonrelativistic Functional Properties in Collinear Antiferromagnets Based on Multipole Representation Theory
• Nonlinear opto-magnetic signature of d-wave altermagnets
• Time reversal reserved spin valve and spin transistor based on unconventional $p$-wave magnets
• Magnetic aftereffect and Barkhausen effect in thin films of the altermagnetic candidate Mn5Si3
• Spin transport in a normal meta-altermagnetic superconducting nanowire junction
• Unconventional Spin Valve Based on Normal Metal/Chiral Molecule/Altermagnet Junctions
• Theory of Angle Resolved Photoemission Spectroscopy of Altermagnetic Mott Insulators
• Coexistence of d-Wave Altermagnetism and Topological States in Janus FeSeX (X = S, Te) Monolayers
• Ab initio study of magnetoresistance effect in $\mathrm{M}{\mathrm{n}}_3\mathrm{Sn}/\mathrm{MgO}/\mathrm{M}{\mathrm{n}}_3\mathrm{Sn}$ antiferromagnetic tunnel junction
• Wurtzite MnSe as a barrier for CdSe quantum wells with built-in electric field
• Spin-Polarized Magnetic Metal Electrodes for Magnetic Tunnel Junctions
• Spin-Orbit Coupling-Driven Chirality Switching of Spin Waves in Altermagnets
• Quantum-impurity sensing of altermagnetic order
• Intrinsic spin currents in bulk noncentrosymmetric ferromagnets
• Revealing Spin and Spatial Symmetry Decoupling: New Insights into Magnetic Systems with Dzyaloshinskii-Moriya Interaction
• All-electrical switching of spin texture in a strain-tunable 2D Janus ferroelectric altermagnet
• Absence of magnetic order and magnetic fluctuations in RuO${}_2$
• Spontaneous emergence of altermagnetism in the single-orbital extended Hubbard model
• Antiferroaxial altermagnetism
• Spin triplet pairing by suppressing altermagnetism