Fully gapped pairing state in spin-triplet superconductor UTe₂.

ABSTRACT: The recently discovered superconductor UTe₂ is a promising candidate for spin-triplet superconductors, but the symmetry of the superconducting order parameter remains highly controversial. Here, we determine the superconducting gap structure by the thermal conductivity of ultraclean UTe₂ single crystals. We find that the a-axis thermal conductivity divided by temperature κ/T in zero-temperature limit is vanishingly small for both magnetic field H‖a and H‖c axes up to H/H_c2 ∼ 0.2, demonstrating the absence of nodes around the a axis contrary to the previous belief. The present results, combined with the reduction of nuclear magnetic resonance Knight shift, indicate that the s

SUBMITTER: Suetsugu S 

PROVIDER: S-EPMC10849587 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature