Stacking-dependent ferroicity of reversed bilayer: altermagnetism or ferroelectricity

Abstract

Altermagnetism, as a new branch of magnetism independent of traditional ferromagnetism and antiferromagnetism, has attracted extensive attention recently. At present, researchers have proved several kinds of three-dimensional altermagnets, but research on two-dimensional (2D) altermagnets remains elusive. Here, we propose a method for designing altermagnetism in 2D lattices: bilayer reversed stacking. This method could enable altermagnetism-type spin splitting to occur intrinsically and the spin-splitting can be controlled by crystal chirality. We also demonstrate it through a real material of bilayer PtBr${}_3$ with AB' stacking order. Additionally, the combination of stacking order and slidetronics offers new opportunities for electrical writing and magnetic reading of electronic devices. In the case of AC' stacking, interlayer sliding results in reversible spontaneous polarization. This unique combination of antiferromagnetism and sliding ferroelectricity leads to polarization-controlled spin-splitting, thus enabling magnetoelectric coupling, which can be detected by magneto-optical Kerr effect even without net magnetization. Our research highlights that reversed stacking provides a platform to explore rich physical properties of magnetism, ferroelectricity, and spin-splitting.

arXiv comment5 figures

References in corpus (26)

• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• WannierTools: An open-source software package for novel topological materials
• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• Crystal Hall effect in Collinear Antiferromagnets
• Stacking-Dependent Magnetism in Bilayer CrI${}_3$
• Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet
• Broken Kramers' degeneracy in altermagnetic MnTe
• Prediction of unconventional magnetism in doped FeSb2
• Layer Hall effect in a 2D topological Axion antiferromagnet
• Crystal Thermal Transport in Altermagnetic RuO2
• Gate-controllable magneto-optic Kerr effect in layered collinear antiferromagnets
• Magnetic octupoles as the order parameter for unconventional antiferromagnetism
• Conduction band spin splitting and negative magnetoresistance in ${\mathrm{A}}_3{\mathrm{B}}_5$ heterostructures
• Two-Dimensional Room Temperature Ferromagnetic Semiconductors with Quantum Anomalous Hall Effect
• Description of two-dimensional altermagnetism: Categorization using spin group theory
• Intrinsic Layer-Polarized Anomalous Hall Effect in Bilayer MnBi2Te4
• Bilayer stacking A-type altermagnet: A general approach to generating two-dimensional altermagnetism
• The crucial importance of the $t_{2g}$--$e_g$ hybridization in transition metal oxides
• Switchable anomalous Hall effects in polar-stacked 2D antiferromagnet MnBi2Te4
• Phase competition and negative piezoelectricity in interlayer-sliding ferroelectric ZrI${}_2$
• Ferroic orders in two-dimensional transition/rare-earth metal halides
• Magneto-optical Kerr effect in ferroelectric antiferromagnetic two-dimensional heterostructures
• Monolayer and bilayer PtCl${}_3$: Energetics, magnetism, and band topology

Cited by in corpus (14)

• Antiferroelectric Altermagnets: Antiferroelectricity Alters Magnets
• Robust magnetoelectric coupling in altermagnetic-ferroelectric type-III multiferroics
• Two-Dimensional Ferroelectric Altermagnets: From Model to Material Realization
• Spin-Polarized Antiferromagnetic Spintronics
• Emergent Multiferroic Altermagnets and Spin Control via Noncollinear Molecular Polarization
• Recent Advances in Unconventional Ferroelectrics and Multiferroics
• Ferroelasticity tunable altermagnets
• Symmetry Classification for Alternating Excitons in Two-Dimensional Altermagnets
• Ferroelectric Antiferromagnetic Lifting of Spin-Valley Degeneracy
• A large spin-splitting altermagnet designed from the hydroxylated MBene monolayer
• Tunable altermagnetism via inter-chain engineering in parallelassembled atomic chains
• Achieving Altermagnetism in Monolayer Holey Graphyne via Atomic Manipulation
• Altermagnetism and Anomalous Transport in Ag${}^{2+}$ Fluorides: KAgF${}_3$ and K${}_2$AgF${}_4$
• Stacking-dependent magnetic ordering in bilayer ScI${}_2$