Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe2

Abstract

We report low-temperature muon spin relaxation/rotation (muSR) measurements on single crystals of the actinide superconductor UTe2. Below 5 K we observe a continuous slowing down of magnetic fluctuations that persists through the superconducting (SC) transition temperature (Tc = 1.6 K), but we find no evidence of long-range or local magnetic order down to 0.025 K. The temperature dependence of the dynamic relaxation rate down to 0.4 K agrees with the self-consistent renormalization theory of spin fluctuations for a three-dimensional weak itinerant ferromagnetic metal. Our muSR measurements also indicate that the superconductivity coexists with the magnetic fluctuations.

5 pages, 6 figures

References in corpus (7)

• Spontaneously polarized half-gapped superconductivity
• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Unconventional Superconductivity in Heavy Fermion UTe2
• Quantum critical effects on transition temperature of magnetically mediated p-wave superconductivity
• Strong Enhancement of Superconducting T_c in Ferromagnetic Phases
• 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2
• Strong correlation between ferromagnetic superconductivity and pressure-enhanced ferromagnetic fluctuations in UGe${}_2$

Cited by in corpus (83)

• Microscopic evidence for a chiral superconducting order parameter in the heavy fermion superconductor UTe2
• Unconventional Superconductivity in UTe2
• Field-induced transition from even to odd parity superconductivity in CeRh${}_2$As${}_2$
• Detection of a Pair Density Wave State in UTe${}_2$
• Insulator-metal transition and topological superconductivity in UTe2 from a first-principles calculation
• Evidence for a pressure-induced antiferromagnetic quantum critical point in intermediate valence UTe2
• Point Node Gap Structure of Spin-Triplet Superconductor UTe2
• Recent progress on superconductors with time-reversal symmetry breaking
• Multiple Superconducting Phases and Unusual Enhancement of the Upper Critical Field in UTe2
• Quasi-two-dimensional Fermi surfaces and unitary spin-triplet pairing in the heavy fermion superconductor UTe${}_2$
• Low energy band structure and symmetries of UTe2 from angle resolved photoemission spectroscopy
• Single-component superconducting state in UTe2 at 2 K
• Incommensurate Spin Fluctuations in the Spin-triplet Superconductor Candidate UTe${}_2$
• Periodic Anderson model for magnetism and superconductivity in UTe2
• Topological band and superconductivity in UTe${}_2$
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Resonance from antiferromagnetic spin fluctuations for superconductivity in UTe${}_2$
• Enhanced spin triplet superconductivity due to Kondo destabilization
• Anomalous normal fluid response in a chiral superconductor UTe2
• Chiral superconductivity in UTe2 probed by anisotropic low-energy excitations
• Spatially inhomogeneous superconductivity in UTe2
• Orientation of point nodes and nonunitary triplet pairing tuned by the easy-axis magnetization in UTe2
• Comparison of two superconducting phases induced by a magnetic field in UTe2
• Quasi-2D Fermi surface in the anomalous superconductor UTe2
• Tuning magnetic confinement of spin-triplet superconductivity
• $c$-axis transport in UTe${}_2$: Evidence of Three Dimensional Conductivity Component
• A review of UTe${}_2$ at high magnetic fields
• Interplay between magnetism and superconductivity in UTe2
• Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2
• Anapole superconductivity from $\mathcal{P}\mathcal{T}$-symmetric mixed-parity interband pairing
• Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2
• Symmetry of magnetic correlations in spin-triplet superconductor UTe2
• Absence of Spontaneous Magnetic Fields Due to Time-Reversal Symmetry Breaking in Bulk Superconducting UTe2
• Evidence of Fermi-Surface Reconstruction at the Metamagnetic Transition of the Strongly Correlated Superconductor UTe2
• Slow Electronic Dynamics in the Paramagnetic State of UTe${}_2$
• Theory of spin-polarized superconductors -- an analogue of superfluid ${}^3$He A-phase
• Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe${}_2$
• Expansion of the high field-boosted superconductivity in UTe2 under pressure
• Ubiquitous Spin Freezing in the Superconducting State of UTe2
• Thermodynamic signatures of short-range magnetic correlations in UTe${}_2$
• Non-unitary triplet superconductivity tuned by field-controlled magnetization --URhGe, UCoGe and UTe${}_2$--
• Anomalous Anisotropy of the Lower Critical Field and Meissner Effect in UTe2
• Possible Coexistence of Antiferromagnetic and Ferromagnetic Spin Fluctuations in the Spin-triplet Superconductor UTe2 Revealed by 125Te NMR under Pressure
• Understanding Magnetic Properties of Actinide-Based Compounds from Machine Learning
• Magnetic reshuffling and feedback on superconductivity in UTe2 under pressure
• Thermodynamic and electrical transport properties of UTe${}_2$ under uniaxial stress
• Pressure-induced structural phase transition and new superconducting phase in UTe2
• Nonreciprocal Meissner response in parity-mixed superconductors
• Possible Realization of Topological Crystalline Superconductivity with Time-Reversal Symmetry in UTe2
• Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe${}_2$
• Anisotropic signatures of the electronic correlations in the electrical resistivity of UTe${}_2$
• Low-temperature Magnetic Fluctuations Investigated by ${}^{125}$Te-NMR on the Uranium-based Superconductor UTe${}_2$
• Inhomogeneous high temperature melting and decoupling of charge density waves in spin-triplet superconductor UTe2
• Paramagnetic effects of j-electron superconductivity and application to UTe2
• Topological Anomalous Skin Effect in Weyl Superconductors
• Time-Reversal Symmetry and the Structure of Superconducting Order Parameter of Nearly Ferromagnetic Spin-Triplet Superconductor UTe2
• Anisotropic Enhancement of Lower Critical Field in Ultraclean Crystals of Spin-Triplet Superconductor UTe2
• Odd-Parity Spin-Triplet Superconductivity in Centrosymmetric Antiferromagnetic Metals
• Incommensurate antiferromagnetism in UTe2 under pressure
• On Sharp Enhancement of Effective Mass of Quasiparticles and Coefficient of T^{2} Term of Resistivity around First-Order Metamagnetic Transition Observed in UTe_{2}
• Anisotropic field-induced changes in the superconducting order parameter of UTe2
• Quasi-uniaxial pressure induced superconductivity in stoichiometric compound UTe${}_2$
• Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution
• An optical investigation of the heavy fermion normal state in superconducting UTe${}_2$
• Violation of the orbital depairing limit in a non-unitary state --on the high field phase in the heavy Fermion superconductor UTe${}_2$--
• Theoretical studies on off-axis phase diagrams and Knight shifts in UTe${}_2$ -- Tetra-critical point, d-vector rotation, and multiple phases
• Spectroscopic evidence of symmetry breaking in the superconducting vortices of UTe2
• 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
• Pair-Kondo effect: a mechanism for time-reversal broken superconductivity in UTe${}_2$
• Field-angle evolution of the superconducting and magnetic phases of UTe${}_2$ around the $b$ axis
• Finite temperature effects in quantum systems with competing scalar orders
• Dramatic elastic response at the critical end point in UTe${}_2$
• Observation of vortex stripes in UTe${}_2$
• Novel universality class for the ferromagnetic transition in the low carrier concentration systems UTeS and USeS exhibiting large negative magnetoresistance
• Electron-beam Floating-zone Refined UCoGe
• Phenomenological theory in reentrant uranium-based superconductors
• Nature of quantum criticality in the Ising ferromagnet TbV${}_6$Sn${}_6$
• Magnetic fluctuations and anisotropy in UTe2: a multi-orbital study based on GGA+U and RPA
• Metamagnetic transition in the two $f$ orbitals Kondo lattice model
• Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model
• Electronic structure of UTe${}_2$ under pressure
• Broken time-reversal symmetry detected by tunneling spectroscopy of superconducting Pd-doped CaAgP