Antiferroaxial altermagnetism

Abstract

The antiferroaxial state is emerging as an important ferroic order in condensed matter systems. Here, we establish antiferroaxial altermagnetism as a broadly prevalent, generic, and microscopically grounded multiferroic mechanism, in which antiferroaxial counter-rotating distortions both induce altermagnetism and enable its deterministic and reversible switching. Within a unified Landau-theory and symmetry framework, we identify a symmetry-allowed trilinear invariant coupling the antiferroaxial order, the Néel vector, and the altermagnetic order, and derive general symmetry criteria for its occurrence. This coupling locks the induced altermagnetism to the antiferroaxial order, so that reversing the latter reverses the spin splitting and associated time-reversal-odd responses, such as anomalous Hall conductivity. We provide a practical spin group dictionary mapping Néel-vector representations to the resulting $d$-, $g$-, and $i$-wave antiferroaxial altermagnetism, validate the mechanism with ligand-rotation tight-binding models and first-principles calculations, and identify many candidate materials by screening the MAGNDATA and C2DB databases. Our results elevate antiferroaxiality to a universal ferroic control knob for structurally programmable altermagnetic spintronics.

9+18 pages, 4+10 figures, 2+3 tables

References in corpus (43)

• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• The Computational 2D Materials Database: High-Throughput Modeling and Discovery of Atomically Thin Crystals
• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet
• Ab initio calculation of the anomalous Hall conductivity by Wannier interpolation
• Recent Progress of the Computational 2D Materials Database (C2DB)
• Giant momentum-dependent spin splitting in centrosymmetric low Z antiferromagnets
• Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
• Multifunctional Antiferromagnetic Materials with Giant Piezomagnetism and Noncollinear Spin Current
• Giant and tunneling magnetoresistance effects from anisotropic and valley-dependent spin-momentum interactions in antiferromagnets
• Giant improper ferroelectricity in the ferroaxial magnet CaMn7O12
• Crystal Thermal Transport in Altermagnetic RuO2
• Spin-group symmetry in magnetic materials with negligible spin-orbit coupling
• Fermi liquid instabilities in the spin channel
• Topological Superconductivity in Two-Dimensional Altermagnetic Metals
• Finite-momentum Cooper pairing in proximitized altermagnets
• Antiferroelectric Altermagnets: Antiferroelectricity Alters Magnets
• Ferroelectric switchable altermagnetism
• Landau Theory of Altermagnetism
• Twisted Magnetic Van der Waals Bilayers: An Ideal Platform for Altermagnetism
• Altermagnetic Routes to Majorana Modes in Zero Net Magnetization
• Predictable gate-field control of spin in altermagnets with spin-layer coupling
• Observation of a ferro-rotational order coupled with second-order nonlinear optical fields
• Majorana corner modes and tunable patterns in an altermagnet heterostructure
• Two-dimensional altermagnets from high throughput computational screening: symmetry requirements, chiral magnons and spin-orbit effects
• Spontaneous Formation of Altermagnetism from Orbital Ordering
• Creation and Manipulation of Higher-Order Topological States by Altermagnets
• Eight types of physical "arrows" distinguished by Newtonian space-time symmetry
• Bilayer stacking A-type altermagnet: A general approach to generating two-dimensional altermagnetism
• AI-accelerated Discovery of Altermagnetic Materials
• Orientation-dependent Josephson effect in spin-singlet superconductor/altermagnet/spin-triplet superconductor junctions
• Third-order and fifth-order nonlinear spin-current generation in $g$-wave and $i$-wave altermagnets, and perfectly nonreciprocal spin-current in $f$-wave magnets
• Coulomb Drag in Altermagnets
• Electrical switching of altermagnetism
• Design of altermagnetic models from spin clusters
• Contrasting Light-Induced Spin Torque in Antiferromagnetic and Altermagnetic Systems
• Collinear Altermagnets and their Landau Theories
• Uncovering the Hidden Ferroaxial Density Wave as the Origin of the Axial Higgs Mode in RTe${}_3$
• Ferroelasticity tunable altermagnets
• Symmetry Classification for Alternating Excitons in Two-Dimensional Altermagnets
• Piezoresistivity as a Fingerprint of Ferroaxial Transitions
• Noncollinear Magnetic Multipoles in Collinear Altermagnets