Suppression and reemergence of directional transport across the ferromagnetic transition in SrRuO${}_3$

Abstract

SrRuO${}_3$ is a canonical itinerant ferromagnet that continues to serve as a fertile platform for exploring spin-orbit coupled transport and topological responses in correlated oxide metals. Here, we investigate a (110)-oriented epitaxial SrRuO3 thin film on DyScO${}_3$, where crystallographic anisotropy allows for symmetry-resolved charge transport along orthogonal in-plane directions. We uncover two principal findings. First, the resistance above the Curie temperature $T_{c,on}\approx 165$ K exhibits strong anisotropy, consistent with directionally dependent spin-fluctuation scattering. Below $T_{c,on}$, this anisotropy nearly vanishes, despite persistent structural inequivalence, due to isotropic electron-magnon and electron-electron scattering processes. Second, the application of a magnetic field reveals a striking directional contrast in the linear magnetoresistance (MR): it remains negative and saturates along [001], but changes sign and becomes positive along $[1\bar{1}0]$ below $T_0=145$ K. In contrast, the quadratic MR term is identical for both directions and peaks near $T_{\mathrm{OHE}}^{\ast }=155$ K, where the ordinary Hall coefficient crosses zero, consistent with carrier compensation under a two-band scenario. A sign change in the anomalous Hall signal at $T_{\mathrm{AHE}}^{\ast }=150$ K is consistent with a temperature-dependent redistribution of Berry-curvature contributions near the Fermi level. These results establish ferromagnetic ordering as the primary driver of the observed directional magnetotransport in SrRuO${}_3$.

arXiv commentSupplementary Information included

References in corpus (15)

• Berry Phase Effects on Electronic Properties
• Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Transport Properties, Thermodynamic Properties, and Electronic Structure of SrRuO3
• Electronic structure and magnetism in Ru based perovskites
• Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide
• Manipulating Berry curvature of SrRuO3 thin films via epitaxial strain
• Sign-tunable anomalous Hall effect induced by two-dimensional symmetry-protected nodal structures in ferromagnetic perovskite oxide thin films
• Bayesian optimization with experimental failure for high-throughput materials growth
• Tuning electromagnetic properties of SrRuO3 epitaxial thin films via atomic control of cation vacancies
• Scaling of Berry-curvature monopole dominated large linear positive magnetoresistance
• Resistive anisotropy due to spin-fluctuation scattering in the nematic phase of iron pnictides
• Robust skyrmion-bubble textures in SrRuO${}_3$ thin films stabilized by magnetic anisotropy
• Two-carrier Magnetoresistance: Applications to Ca${}_3$Ru${}_2$O${}_7$
• Electric control of two-dimensional Van Hove singularity in oxide ultra-thin films