Back to Search
Start Over
Field-induced tuning of the pairing state in a superconductor
- Publication Year :
- 2022
-
Abstract
- The recently discovered superconductor UTe$_2$, with a T$_c$ between 1.5~K and 2~K, is attracting much attention due to strong suspicion of spin-triplet and topological superconductivity. Its properties under magnetic field are also remarkable, with field-reinforced and field-induced superconducting phases. Here, we report the first complete thermodynamic determination of the phase diagram for fields applied along the three crystallographic directions. Measurements were performed up to 36~T along the hard magnetisation $b$~axis in order to follow the superconducting transition up to the metamagnetic transition at $H_{m} = 34.75$~T. They reveal the existence of a phase transition line within the superconducting phase, and drastic differences occurring between these two phases. Detailed analysis supports a different spin state between the two phases, implying a low-field spin-triplet to high-field spin-singlet transition, a unique case among superconductors, giving insight on the mechanisms leading to spin-triplet superconductivity.<br />Comment: Main paper : 17 pages and 15 figures, supplementary material : 17 pages and 17 figures
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2205.04524
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevX.13.011022