Topological Hall Effect and Emergent Skyrmion Crystal in Manganite-Iridate Oxide Interfaces

Abstract

Scalar spin chirality is expected to induce a finite contribution to the Hall response at low temperatures. We study this spin-chirality-driven Hall effect, known as the topological Hall effect, at the manganite side of the interface between La${}_{1-x}$Sr${}_x$MnO${}_3$ and SrIrO${}_3$. The ferromagnetic double-exchange hopping at the manganite layer, in conjunction with the Dzyaloshinskii-Moriya (DM) interaction which arises at the interface due to broken inversion symmetry and strong spin-orbit coupling from the iridate layer, could produce a skyrmion-crystal (SkX) phase in the presence of an external magnetic field. Using the Monte Carlo technique and a two-orbital spin-fermion model for manganites, supplemented by an in-plane DM interaction, we obtain phase diagrams which reveal at low temperatures a clear SkX phase and also a low-field spin-spiral phase. Increasing temperature, a skyrmion-gas phase, precursor of the SkX phase upon cooling, was identified. The topological Hall effect primarily appears in the SkX phase, as observed before in oxide heterostructures. We conclude that the manganite-iridate superlattices provide another useful platform to explore a plethora of unconventional magnetic and transport properties.

9 pages, 5 figures

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Cited by in corpus (24)

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• Mechanism of antisymmetric spin polarization in centrosymmetric multiple-$Q$ magnets based on bilinear and biquadratic spin cross products
• Flat Bands and Ferrimagnetic Order in Electronically Correlated Dice-Lattice Ribbons
• Multifarious skyrmion phases on a trilayer triangular lattice
• Skyrmion fluid and bimeron glass protected by a chiral spin liquid on a kagome lattice
• Rashba-Zener mechanism for nanoscale skyrmions and topological metals
• Tailoring magnetic order via atomically stacking 3d/5d electrons
• Origin of the hump anomalies in the Hall resistance loops of ultrathin SrRuO${}_3$/SrIrO${}_3$ multilayers
• Planar Topological Hall Effect from Conical Spin Spirals
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• Topological Hall Effect and Skyrmion-like Bubbles at a Charge-transfer Interface
• Signatures of a liquid-crystal transition in spin-wave excitations of skyrmions
• Interfacial phase frustration stabilizes unconventional skyrmion crystals
• Antiskyrmions and Bloch Skyrmions in Magnetic Dresselhaus Metals
• Skyrmion-driven topological Hall effect in a Shastry-Sutherland magnet
• Multifunctional Oxides for Topological Magnetic Textures by Design
• Chern insulating state with double-$Q$ ordering wave vectors at the Brillouin zone boundary
• Anomalous magnetoentropic response of skrymion crystals
• J = 0 nonmagnetic insulating state in K${}_2$Os$X_6$ (X = F, Cl and Br)
• Evolution of electronic and magnetic properties of Sr${}_2$IrO${}_4$ under strain
• Anisotropic planar Hall effects in Bi${}_2$Se${}_3$/EuS interfaces: Deciphering the role of proximity induced spin canting and topological spin texture
• Asymmetric magnetoresistance in 3$d$-5$d$ based La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$/SrIrO${}_3$ bilayer: The role of unidirectional anisotropy