Anomalous c-axis Transport Response of UTe2*

We study the temperature dependence of electrical resistivity for currents directed along all crystallographic axes of the spin-triplet superconductor UTe₂. We focus particularly on an accurate determination of the resistivity along the c-axis (ρ_c) by using transport geometries that allow extraction of two resistivities along with the primary axes directions. In contrast to the existence of the highly anisotropic band structure, our measurement of the absolute values of resistivities in all current directions reveals a surprisingly nearly isotropic transport behavior. The temperature dependence of ρ_c exhibits a peak associated with the temperature much lower than the onset of Kondo coherence observed in ρ_a and ρ_b, consistent with features in magnetotransport and magnetization that point to a magnetic origin.  A comparison to the temperature-dependent evolution of scattering observed in angle-resolved photoemission experiments also provides important insights into the underlying electronic structure necessary for building a microscopic model of UTe₂.