The normal state out of which unconventional superconductivity in UTe2 emerges is studied in detail using a variety of thermodynamic and transport probes. Clear evidence for a broad Schottky-like anomaly with roughly Rln2 entropy around T∗≈12 K is observed in all measured quantities. Comparison with high magnetic field transport data allows the construction of an H-T phase diagram resembling that of the ferromagnetic superconductor URhGe. The low-field electronic Grüneisen parameter of T∗ and that of the metamagnetic transition at Hm≈35 T are comparable pointing to a common origin of both phenomena. Enhanced Wilson and Korringa ratios suggest that the existence of short-range ferromagnetic fluctuations cannot be ruled out.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics