Comparison of two superconducting phases induced by a magnetic field in UTe2

Abstract

Superconductivity induced by a magnetic field near metamagnetism is a striking manifestation of magnetically-mediated superconducting pairing. After being observed in itinerant ferromagnets, this phenomenon was recently reported in the orthorhombic paramagnet UTe${}_2$. Under a magnetic field applied along the hard magnetization axis b, superconductivity is reinforced on approaching metamagnetism at ${\mu }_0{H}_m$ = 35 T, but it abruptly disappears beyond $H_m$. On the contrary, field-induced superconductivity was reported beyond ${\mu }_0{H}_m$ = 40-50 T in a magnetic field tilted by $\simeq 25-30°$ from b in the (b,c) plane. Here we explore the phase diagram of UTe2 under these two magnetic-field directions. Zero-resistance measurements permit to confirm unambiguously that superconductivity is established beyond Hm in the tilted-field direction. While superconductivity is locked exactly at fields either smaller (for a H || b), or larger (for H tilted by $\simeq 27°$ from b to c), than Hm, the variations of the Fermi-liquid coefficient in the electrical resistivity and of the residual resistivity are surprisingly similar for the two field directions. The resemblance of the normal states for the two field directions puts constraints for theoretical models of superconductivity and implies that some subtle ingredients must be in play.

18 pages, 5 Figures, includes Supplementary Information (9 pages, 8 Figures)

References in corpus (28)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Unconventional Superconductivity in Heavy Fermion UTe2
• Unconventional Superconductivity
• Review of U-based Ferromagnetic Superconductors: Comparison between UGe2, URhGe, and UCoGe
• Tricritical point and wing structure in the itinerant ferromagnet UGe2
• 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${}_2$
• 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2
• Magnetic-Field-Induced Phenomena in the Paramagnetic Superconductor UTe${}_2$
• Heavy fermions in high magnetic field
• Field Re-entrant Superconductivity Induced by the Enhancement of Effective Mass in URhGe
• Anisotropy of the Upper Critical Field in the Heavy-Fermion Superconductor UTe2 under Pressure
• Tuning magnetic confinement of spin-triplet superconductivity
• High-field moment polarization in the ferromagnetic superconductor UCoGe
• Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor UTe${}_2$
• Collapse of ferromagnetism and Fermi surface instability near reentrant superconductivity of URhGe
• Evidence of Fermi-Surface Reconstruction at the Metamagnetic Transition of the Strongly Correlated Superconductor UTe2
• Dimensionality driven enhancement of ferromagnetic superconductivity in URhGe
• Relationship between Ferromagnetic Criticality and the Enhancement of Superconductivity Induced by Transverse Magnetic Fields in UCoGe
• Three-dimensional critical phase diagram of the Ising antiferromagnet CeRh${}_2$Si${}_2$ under intense magnetic field and pressure
• Reentrant superconductivity in UTe${}_2$
• Restoration of superconductivity in high magnetic fields in UTe${}_2$
• Spin-triplet superconductivity in the paramagnetic UCoGe under pressure studied by ${}^{59}$Co NMR
• Quantum Limit in a Magnetic Field for Triplet Superconductivity in a Quasi-One-Dimensional Conductor

Cited by in corpus (40)

• Unconventional Superconductivity in UTe2
• Single-component superconducting state in UTe2 at 2 K
• First Observation of de Haas-van Alphen Effect and Fermi Surfaces in Unconventional Superconductor UTe2
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Spatially inhomogeneous superconductivity in UTe2
• A review of UTe${}_2$ at high magnetic fields
• Fully gapped pairing state in spin-triplet superconductor UTe${}_2$
• Change of superconducting character in UTe2induced by magnetic field
• Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2
• Enhanced triplet superconductivity in next generation ultraclean UTe2
• Slow Electronic Dynamics in the Paramagnetic State of 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${}_2$
• Field-induced compensation of magnetic exchange as the possible origin of reentrant superconductivity in UTe${}_2$
• Expansion of the high field-boosted superconductivity in UTe2 under pressure
• Longitudinal spin fluctuations driving field-reinforced superconductivity in UTe${}_2$
• Thermodynamic and electrical transport properties of UTe${}_2$ under uniaxial stress
• Magnetic reshuffling and feedback on superconductivity in UTe2 under pressure
• Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe${}_2$
• Anisotropic signatures of the electronic correlations in the electrical resistivity of UTe${}_2$
• Multiple superconducting phases in heavy-fermion metals
• Drastic change in magnetic anisotropy of UTe2 under pressure revealed by 125Te-NMR
• Clear Reduction in Spin Susceptibility and Superconducting Spin Rotation for $H\parallel a$ in the Early-Stage Sample of Spin-Triplet Superconductor UTe${}_2$
• Anisotropic Enhancement of Lower Critical Field in Ultraclean Crystals of Spin-Triplet Superconductor UTe2
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
• A quantum critical line bounds the high field metamagnetic transition surface in UTe${}_2$
• Anisotropic field-induced changes in the superconducting order parameter of UTe2
• Incommensurate antiferromagnetism in UTe2 under pressure
• Fermi-surface reconstruction at the metamagnetic high-field transition in uranium mononitride
• 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
• Field-angle evolution of the superconducting and magnetic phases of UTe${}_2$ around the $b$ axis
• Self-reconstruction of order parameter in spin-triplet superconductor UTe${}_2$
• Dramatic elastic response at the critical end point in UTe${}_2$
• Observation of vortex stripes in UTe${}_2$
• Slow magnetic quantum oscillations in the c-axis magnetoresistance of UTe${}_2$
• Metamagnetism in the high-pressure tetragonal phase of UTe${}_2$
• Pauli 'unlimited': magnetic field induced-superconductivity in UTe${}_2$
• Boosted magnetic fluctuations at the onset of superconductivity in UTe${}_2$ beyond 40 T
• Pressure-enhanced $f$-electron orbital weighting in UTe2 mapped by quantum interferometry