Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe2.

ABSTRACT: We report low-temperature muon spin relaxation/rotation (μSR) measurements on single crystals of the actinide superconductor UTe2. Below 5 K we observe a continuous slowing down of magnetic fluctuations that persists through the superconducting transition temperature (Tc = 1.6 K), but we find no evidence of long-range or local magnetic order down to 0.025 K. The temperature dependence of the dynamic relaxation rate down to 0.4 K agrees with the self-consistent renormalization theory of spin fluctuations for a three-dimensional weak itinerant ferromagnetic metal. Our μSR measurements also indicate that the superconductivity coexists with the magnetic fluctuations.

SUBMITTER: Sundar S 

PROVIDER: S-EPMC8201662 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature