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 R ln 2 entropy around T∗≈12K 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 Gr\"uneisen parameter of T∗ and that of the metamagnetic transition at Hm≈35T are comparable pointing to a common origin of both phenomena. Enhanced Wilson and Korringa ratios suggests that the existence of short range ferromagnetic fluctuations cannot be ruled out.
@article{arxiv.2107.02706,
title = {Thermodynamic signatures of short-range magnetic correlations in UTe$_2$},
author = {Kristin Willa and Frédéric Hardy and Dai Aoki and Dexin Li and Paul Wiecki and Gérard Lapertot and Christoph Meingast},
journal= {arXiv preprint arXiv:2107.02706},
year = {2021}
}