We present a systematic investigation of the Hall effect and transverse-resistive behavior in superconducting $\mathrm{LaAl}{\mathrm{O}}_3/\mathrm{KTa}{\mathrm{O}}_3$(111) interfaces. Upon cooling Hall-bar-shaped samples in zero magnetic field, we observe a sharp anomalous transverse-resistance peak emerging in the superconducting transition region. When sweeping magnetic field along the out-of-plane direction at temperatures below the superconducting transition, we detect remarkable anomalous transverse-resistance peaks exhibiting even symmetry with respect to the field—a striking deviation from the conventional odd-symmetric Hall resistance. With decreasing temperature, these anomalous features shift to higher fields while their magnitude increases rapidly. Our analysis attributes both unusual transverse-resistance phenomena to subtle resistive inhomogeneities arising from uneven distribution of vortices (antivortices) at the interfaces. These findings not only elucidate the unique vortex dynamics in $\mathrm{KTa}{\mathrm{O}}_3$-based interfacial superconductors but also demonstrate how transverse-resistance measurements can serve as a sensitive probe for investigating inhomogeneous superconducting states in two-dimensional systems.

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• Magnetoresistance
• Superconductivity