Interfacial crystal Hall effect reversible by ferroelectric polarization

Abstract

The control of spin-dependent properties by voltage, not involving magnetization switching, has significant advantages for low-power spintronics. Here, we predict that the interfacial crystal Hall effect (ICHE) can serve for this purpose. We show that the ICHE can occur in heterostructures composed of compensated antiferromagnetic metals and non-magnetic insulators due to reduced symmetry at the interface, and it can be made reversible if the antiferromagnet is layered symmetrically between two identical ferroelectric layers. We explicitly demonstrate this phenomenon using density functional theory calculations for three material systems: MnBi${}_2$Te${}_4$/GeI${}_2$ and topological In${}_2$Te${}_3$/MnBi${}_2$Te${}_4$/In${}_2$Te${}_3$ van der Waals heterostructures, and GeTe/Ru${}_2$MnGe/GeTe heterostructure composed of three-dimensional materials. We show that all three systems reveal a sizable ICHE, while the latter two exhibit a quantum ICHE and ICHE, respectively, reversible with ferroelectric polarization. Our proposal opens an alternative direction for voltage controlled spintronics and offers not yet explored possibilities for functional devices by heterostructure design.

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• Intrinsic Layer-Polarized Anomalous Hall Effect in Bilayer MnBi2Te4
• Essential role of anisotropic magnetic dipole in anomalous Hall effect
• Switchable anomalous Hall effects in polar-stacked 2D antiferromagnet MnBi2Te4
• Spin-Polarized Antiferromagnetic Spintronics
• Electric Ferro-Axial Moment as Nanometric Rotator and Source of Longitudinal Spin Current
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• The chiral Hall effect in canted ferromagnets and antiferromagnets
• Transport Spin Polarization of Noncollinear Antiferromagnetic Antiperovskites
• Ferroelectric higher-order topological insulator in two dimensions
• Intrinsic magnetic topological insulators of the MnBi${}_2$Te${}_4$ family
• Revealing the Altermagnetism in Hematite via XMCD Imaging and Anomalous Hall Electrical Transport
• Ferroaxial moment induced by vortex spin texture
• Non-volatile Electric Control of Magnetic and Topological Properties of MnBi2Te4 Thin Films
• Electric and spin current vortices in altermagnets
• Dirac fermions in the altermagnet Ce4Sb3
• Magnetic-Field and Strain Engineering of Modulated Transverse Transport in Altermagnetic Topological Materials