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.

References in corpus (33)

• Spontaneously polarized half-gapped superconductivity
• Universally diverging Grueneisen parameter and the magnetocaloric effect close to quantum critical points
• Unconventional Superconductivity in Heavy Fermion UTe2
• Extreme magnetic field-boosted superconductivity
• Review of U-based Ferromagnetic Superconductors: Comparison between UGe2, URhGe, and UCoGe
• Sign change of the Grueneisen parameter and magnetocaloric effect near quantum critical points
• Evidence of Strong Correlations and Coherence-Incoherence Crossover in the Iron Pnictide Superconductor KFe2As2
• Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor UTe${}_2$
• Multiple superconducting phases in a nearly ferromagnetic system
• Tricritical point and wing structure in the itinerant ferromagnet UGe2
• Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe2
• Metamagnetic Transition in Heavy Fermion Superconductor UTe2
• Evidence for a pressure-induced antiferromagnetic quantum critical point in intermediate valence UTe2
• Multiple Superconducting Phases and Unusual Enhancement of the Upper Critical Field in UTe2
• Low energy band structure and symmetries of UTe2 from angle resolved photoemission spectroscopy
• Incommensurate Spin Fluctuations in the Spin-triplet Superconductor Candidate UTe${}_2$
• Ferromagnetic Quantum Critical Endpoint in UCoAl
• 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Enhanced spin triplet superconductivity due to Kondo destabilization
• Emergent Kondo scaling in iron-based superconductors AFe2As2 (A = K, Rb, Cs)
• Strong Correlations, Strong Coupling and s-wave Superconductivity in Hole-doped BaFe2As2 Single Crystals
• Magnetic-Field-Induced Phenomena in the Paramagnetic Superconductor UTe${}_2$
• Long range order and two-fluid behavior in heavy electron materials
• Anisotropy of the Upper Critical Field in the Heavy-Fermion Superconductor UTe2 under Pressure
• Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2
• Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor UTe${}_2$
• Competing Magnetic Fluctuations in Iron Pnictide Superconductors: Role of Ferromagnetic Spin Correlations Revealed by NMR
• Pressure Evolution of the Ferromagnetic and Field Re-entrant Superconductivity in URhGe
• Fermi-Surface Instabilities in the Heavy-Fermion Superconductor UTe2
• Emerging symmetric strain response and weakening nematic fluctuations in strongly hole-doped iron-based superconductors
• Dominant in-plane symmetric elastoresistance in CsFe2As2
• Pressure dependence of coherence-incoherence crossover behavior in KFe2As2 observed by resistivity and 75As-NMR/NQR

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• $c$-axis transport in UTe${}_2$: Evidence of Three Dimensional Conductivity Component
• 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${}_2$
• Metastable phase of UTe${}_2$ formed under high pressure above 5 GPa
• Structure of the normal state and origin of Schottky anomaly in the correlated heavy fermion superconductor UTe2
• 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${}_2$
• ${\mu }^{+}$ Knight Shift in UTe${}_2$: Evidence for Relocalization in a Kondo Lattice
• Intrinsic low-temperature magnetic properties on the ultra-clean UTe${}_2$ with $T_{\mathrm{c}}$ = 2.1 K revealed by ${}^{125}$Te NMR
• Lattice Instability of UTe${}_2$ Studied by Ultrasonic Measurements