Field-induced compensation of magnetic exchange as the possible origin of reentrant superconductivity in UTe₂.

ABSTRACT: The potential spin-triplet heavy-fermion superconductor UTe₂ exhibits signatures of multiple distinct superconducting phases. For field aligned along the b axis, a metamagnetic transition occurs at μ₀H_m ≈ 35 T. It is associated with magnetic fluctuations that may be beneficial for the field-reinforced superconductivity surviving up to H_m. Once the field is tilted away from the b towards the c axis, a reentrant superconducting phase emerges just above H_m. In order to better understand this remarkably field-resistant superconducting phase, we conducted magnetic-torque and magnetotransport measurements in pulsed magnetic fields. We determine the record-breaking upper critical field of μ₀H_c2 ≈ 73 T and its evolution w

SUBMITTER: Helm T 

PROVIDER: S-EPMC10761692 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature