Controllable thickness inhomogeneity and Berry-curvature-engineering of anomalous Hall effect in SrRuO3 ultrathin films

Abstract

In quantum matters hosting electron-electron correlation and spin-orbit coupling, spatial inhomogeneities, arising from competing ground states, can be essential for determining and understanding topological properties. A prominent example is Hall anomalies observed in SrRuO3 films, which were interpreted in terms of either magnetic skyrmion-induced topological Hall effect (THE) or inhomogeneous anomalous Hall effect (AHE). To clarify this ambiguity, we systematically investigated the AHE of SrRuO3 ultrathin films with controllable inhomogeneities in film thickness (tSRO). By harnessing the step-flow growth of SrRuO3 films, we induced microscopically-ordered stripes with one-unit-cell differences in tSRO. The resultant spatial distribution of momentum-space Berry curvatures enables a two-channel AHE, which shows hump-like anomalies similar to the THE and can be continuously engineered via sub-unit-cell control of tSRO. In these inhomogeneous SRO films, we microscopically identified a two-step magnetic switching and stripe-like ferromagnetic domains. These features are fingerprints for distinguishing the two-channel AHE from the skyrmion-induced THE.

24 pages, 6 figures, 4 figures in Supplementary Materials

References in corpus (31)

• Berry Phase Effects on Electronic Properties
• Anomalous Hall effect
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Complexity in Strongly Correlated Electronic Systems
• Topological Insulator Materials
• Topological Hall effect in the A-phase of MnSi
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Correlated quantum phenomena in the strong spin-orbit regime
• Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space
• Massive Dirac fermions in a ferromagnetic kagome metal
• Large anomalous Hall effect driven by non-vanishing Berry curvature in non-collinear antiferromagnetic Mn3Ge
• Tunable Room Temperature Magnetic Skyrmions in Ir/Fe/Co/Pt Multilayers
• Three-Dimensional Topological Insulators
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• Interface-driven topological Hall effect in SrRuO${}_3$-SrIrO${}_3$ bilayer
• Theoretical prediction of a strongly correlated Dirac metal
• Fundamental thickness limit of itinerant ferromagnetic SrRuO${}_3$ thin films
• Electric-field control of anomalous and topological Hall effects in oxide bilayer thin films
• Giant topological Hall effect in correlated oxide thin films
• Recent progress on correlated electron systems with strong spin-orbit coupling
• Scaling of the anomalous Hall effect in Sr${}_{1-x}$Ca${}_x$RuO${}_3$
• Real-Space Berry Phases - Skyrmion Soccer
• Field induced topological Hall effect in non-coplanar triangular antiferromagnetic geometry of Mn3Sn
• An alternative to the topological interpretation of the transverse resistivity anomalies in SrRuO3
• Spin chirality fluctuation in two-dimensional ferromagnets with perpendicular anisotropy
• Berry phase engineering at oxide interfaces
• Interpretation of experimental evidence of the topological Hall effect
• Direct evidence of ferromagnetism in a quantum anomalous Hall system
• Evidence of a topological Hall effect in Eu${}_{1-x}$Sm${}_x$TiO${}_3$
• A route to room temperature ferromagnetic ultrathin SrRuO${}_3$ films
• Orbital-selective confinement effect of Ru $4d$ orbitals in SrRuO${}_3$ ultrathin film

Cited by in corpus (29)

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• Berry phase engineering at oxide interfaces
• Giant Topological Hall Effect in van der Waals Heterostructures of CrTe2/Bi2Te3
• Two-channel anomalous Hall effect in SrRuO3
• Gradient-induced Dzyaloshinskii-Moriya interaction
• Coupling charge and topological reconstructions at polar oxide interfaces
• Materials challenges for SrRuO3: from conventional to quantum electronics
• Origin of the hump anomalies in the Hall resistance loops of ultrathin SrRuO${}_3$/SrIrO${}_3$ multilayers
• Advances in Complex Oxide Quantum Materials Through New Approaches to Molecular Beam Epitaxy
• Topological Hall Effect and Skyrmion-like Bubbles at a Charge-transfer Interface
• Detection of the Chiral Spin Structure in Ferromagnetic SrRuO${}_3$ Thin Film
• Domain wall skew scattering in ferromagnetic Weyl metals
• Resonant optical topological Hall conductivity from skyrmions
• Anomalous Kerr Effect in SrRuO${}_3$ Thin Films
• Skyrmionics in correlated oxides
• Capping and gate control of anomalous Hall effect and hump structure in ultra-thin SrRuO${}_3$ films
• Angular dependence of Hall effect and magnetoresistance in SrRuO${}_3$-SrIrO${}_3$ heterostructures
• Magnetism and berry phase manipulation in an emergent structure of perovskite ruthenate by (111) strain engineering
• Evolution of electronic band reconstruction in thickness-controlled perovskite SrRuO${}_3$ thin films
• Dimensionality Engineering of Magnetic Anisotropy from Anomalous Hall Effect in Synthetic SrRuO3 Crystals
• Multifunctional Oxides for Topological Magnetic Textures by Design
• Absence of topological Hall effect in Fe${}_x$Rh${}_{100-x}$ epitaxial films: revisiting their phase diagram
• Sign competing sources of Berry curvature and anomalous Hall conductance humps in topological ferromagnets
• Angular dependence of hump-shape Hall Effects for distinguishing between Karplus-Luttinger and Geometrical Origins
• Bounds and anomalies of inhomogeneous anomalous Hall effects
• Non-uniform magnetization profile in ferromagnetic heterostructures leading to topological Hall effect like signatures
• Ferromagnetic Two-dimensional Electron Gases with Magnetic Doping and Proximity Effects
• Strain Engineering of van Hove Singularity and Coupled Itinerant Ferromagnetism in Quasi-2D Oxide Superlattices
• Topological Hall Effect Induced by Chiral Spin Textures at the Ferroelectric/Ferromagnetic Interface