Thermodynamic signatures of short-range magnetic correlations in UTe2

Kristin Willa, Frédéric Hardy, Dai Aoki, Dexin Li, Paul Wiecki, Gérard Lapertot, Christoph Meingast

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number205107
JournalPhysical Review B
Volume104
Issue number20
DOIs
Publication statusPublished - 2021 Nov 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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