Magnetic reshuffling and feedback on superconductivity in UTe2 under pressure

Abstract

The discovery of superconductivity in the heavy-fermion paramagnet UTe${}_2$ has attracted a lot of attention, particularly due to the reinforcement of superconductivity near pressure- and magnetic-field-induced magnetic quantum phase transitions. A challenge is now to characterize the effects of combined pressure and magnetic fields applied along variable directions in this strongly anisotropic paramagnet. Here, we present an investigation of the electrical resistivity of UTe${}_2$ under pressure up to 3~GPa and pulsed magnetic fields up to 58~T along the hard magnetic crystallographic directions $\mathbf{b}$ and $\mathbf{c}$. We construct three-dimensional phase diagrams and show that, near the critical pressure, a field-enhancement of superconductivity coincides with a boost of the effective mass related to the collapse of metamagnetic and critical fields at the boundaries of the correlated paramagnetic regime and magnetically-ordered phase, respectively. Beyond the critical pressure, field-induced transitions precede the destruction of the magnetically-ordered phase, suggesting an antiferromagnetic nature. By bringing new elements about the interplay between magnetism and superconductivity, our work appeals for microscopic theories describing the anisotropic properties of UTe${}_2$ under pressure and magnetic field.

12 pages, 7 figures

References in corpus (12)

• Unconventional Superconductivity in Heavy Fermion UTe2
• Metamagnetic Transition in Heavy Fermion Superconductor UTe2
• Multiple Superconducting Phases and Unusual Enhancement of the Upper Critical Field in UTe2
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Magnetic-Field-Induced Phenomena in the Paramagnetic Superconductor UTe${}_2$
• Heavy fermions in high magnetic field
• Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2
• Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor UTe${}_2$
• Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe${}_2$
• Feedback of superconductivity on the magnetic excitation spectrum of UTe${}_2$
• Expansion of the high field-boosted superconductivity in UTe2 under pressure
• Magnetism in heavy-f-electron metals

Cited by in corpus (15)

• Unconventional Superconductivity in UTe2
• A review of UTe${}_2$ at high magnetic fields
• Symmetry of magnetic correlations in spin-triplet superconductor UTe2
• Quantum-geometry-induced anapole superconductivity
• Pressure-induced structural phase transition and new superconducting phase in UTe2
• Pairing symmetries of multiple superconducting phases in UTe2: Competition between ferromagnetic and antiferromagnetic fluctuations
• Anisotropic signatures of the electronic correlations in the electrical resistivity of UTe${}_2$
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
• Incommensurate antiferromagnetism in UTe2 under pressure
• Higher-order topological phases for time-reversal-symmetry breaking superconductivity in UTe${}_2$
• Metamagnetism in the high-pressure tetragonal phase of UTe${}_2$
• Magnetic fluctuations and anisotropy in UTe2: a multi-orbital study based on GGA+U and RPA
• Pressure-enhanced $f$-electron orbital weighting in UTe2 mapped by quantum interferometry
• Electronic structure of UTe${}_2$ under pressure
• Boosted magnetic fluctuations at the onset of superconductivity in UTe${}_2$ beyond 40 T