NMR evidence for full-gap spin-triplet superconducting state in UBe

南 晶子*; 松野 治貴*; 森田 恭平*; 松木 麟太朗*; 小手川 恒*; 播磨 尚朝*; 芳賀 芳範; 山本 悦嗣; 大貫 惇睦*; 藤 秀樹*

Journal of the Physical Society of Japan, 95(7), p.074711_1 - 074711_11, 2026/07

https://doi.org/10.7566/JPSJ.95.074711

We performed Be-NMR measurements on UBe to probe its superconducting state. The Knight shift behavior indicates spin-triplet pairing with anisotropic spin susceptibility reduction below , providing strong evidence for a triplet state. The data support a multiband, fully gapped model, and symmetry analysis suggests an order parameter, consistent with a fully gapped spin-triplet topological superconductor.