Thermodynamic signatures of short-range magnetic correlations in UTe${}_2$

Abstract

The normal-state out of which unconventional superconductivity in UTe${}_2$ 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 $T^{\ast }\approx 12$K is observed in all measured quantities. Comparison with high magnetic field transport data allows the construction of an $H\text{-}T$ phase diagram resembling that of the ferromagnetic superconductor URhGe. The low field electronic Grüneisen parameter of $T^{\ast }$ and that of the metamagnetic transition at $H_m\approx 35$T 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.

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Cited by in corpus (18)

• Unconventional Superconductivity in UTe2
• Field-induced tuning of the pairing state in a superconductor
• Chiral superconductivity in UTe2 probed by anisotropic low-energy excitations
• A review of UTe${}_2$ at high magnetic fields
• Effect of uranium deficiency on normal and superconducting properties in unconventional superconductor UTe${}_2$
• Slow Electronic Dynamics in the Paramagnetic State of UTe${}_2$
• Thermodynamic and electrical transport properties of UTe${}_2$ under uniaxial stress
• Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe${}_2$
• Anisotropic signatures of the electronic correlations in the electrical resistivity of UTe${}_2$
• Structure of the normal state and origin of Schottky anomaly in the correlated heavy fermion superconductor UTe2
• Metastable phase of UTe${}_2$ formed under high pressure above 5 GPa
• Low-temperature Magnetic Fluctuations Investigated by ${}^{125}$Te-NMR on the Uranium-based Superconductor UTe${}_2$
• Absence of a Bulk Thermodynamic Phase Transition to a Density Wave Phase in UTe2
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
• Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe${}_2$
• Intrinsic low-temperature magnetic properties on the ultra-clean UTe${}_2$ with $T_{\mathrm{c}}$ = 2.1 K revealed by ${}^{125}$Te NMR
• ${\mu }^{+}$ Knight Shift in UTe${}_2$: Evidence for Relocalization in a Kondo Lattice
• Lattice Instability of UTe${}_2$ Studied by Ultrasonic Measurements