Uranium ditelluride (UTe₂) is the strongest contender to date for a p-wave superconductor in bulk form. Here we perform a spectroscopic study of the ambient pressure superconducting phase of UTe₂, measuring conductance through point-contact junctions formed by metallic contacts on different crystalline facets down to 250 mK and up to 18 T. Fitting a range of qualitatively varying spectra with a Blonder-Tinkham-Klapwijk (BTK) model for p-wave pairing, we can extract gap amplitude and interface barrier strength for each junction. We find good agreement with the data for a dominant p_y-wave gap function with amplitude 0.26 ± 0.06 meV. Our work provides spectroscopic evidence for a gap structure consistent with the proposed spin-triplet pairing in the superconducting state of UTe₂.

二碲化铀 （UTe₂） 是迄今为止块状 p 波超导体的最有力竞争者。在这里，我们对 UTe₂ 的环境压力超导相进行了光谱研究，测量了通过金属接触形成的点接触结在不同晶体面上的电导率，低至 250 mK 和高达 18 T。使用 Blonder-Tinkham-Klapwijk （BTK） 模型拟合一系列定性变化的光谱以进行 p 波配对，我们可以提取每个结的间隙振幅和界面势垒强度。我们发现振幅为 0.26 ± 0.06 meV 的主导 p_y 波间隙函数的数据非常吻合。我们的工作为间隙结构提供了光谱证据，该结构与 UTe₂ 超导状态下提出的自旋-三重态对一致。