Incommensurate Spin Fluctuations in the Spin-triplet Superconductor Candidate UTe${}_2$

Abstract

Spin-triplet superconductors are of extensive current interest because they can host topological state and Majorana ferimons important for quantum computation. The uranium based heavyfermion superconductor UTe${}_2$ has been argued as a spin-triplet superconductor similar to UGe${}_2$, URhGe, and UCoGe, where the superconducting phase is near (or coexists with) a ferromagnetic (FM) instability and spin-triplet electron pairing is driven by FM spin fluctuations. Here we use neutron scattering to show that although UTe${}_2$ exhibits no static magnetic order down to 0.3 K, its magnetism is dominated by incommensurate spin fluctuations near antiferromagnetic (AF) ordering wave vector and extends to at least 2.6 meV. We are able to understand the dominant incommensurate spin fluctuations of UTe${}_2$ in terms of its electronic structure calculated using a combined density functional and dynamic mean field theory.

arXiv comment6 pages, 4 figures, submitted for publication on July 5th

References in corpus (45)

• Unpaired Majorana fermions in quantum wires
• Paired states of fermions in two dimensions with breaking of parity and time-reversal symmetries, and the fractional quantum Hall effect
• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Topological superconductors: a review
• A Common Thread: the pairing interaction for the unconventional superconductors
• Odd-Parity Topological Superconductors: Theory and Application to Cu${}_x$Bi${}_2$Se${}_3$
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
• Spontaneously polarized half-gapped superconductivity
• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• High Temperature Superconductivity in Iron Pnictides and Chalcogenides
• Microscopic evidence for a chiral superconducting order parameter in the heavy fermion superconductor UTe2
• The effect of collective spin-1 excitations on electronic spectra in high-Tc superconductors
• Fermi Surface Topological Invariants for Time Reversal Invariant Superconductors
• Unconventional Superconductivity in Heavy Fermion UTe2
• Spin resonance in the d-wave superconductor CeCoIn5
• Topological odd-parity superconductors
• Unconventional Superconductivity
• Evidence for incommensurate spin fluctuations in Sr_2RuO_4
• Observation of broken time-reversal symmetry in the heavy fermion superconductor UPt${}_3$
• Extreme magnetic field-boosted superconductivity
• Magnetically driven superconductivity in CeCu2Si2
• Universal relation between magnetic resonance and superconducting gap in unconventional superconductors
• Odd-parity triplet superconductivity in multi-orbital materials with strong spin-orbit coupling: applications to doped Sr2IrO4
• Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe2
• Resonance in the electron-doped high-Tc superconductor Pr0.88LaCe0.12CuO(4-delta)
• Spin-triplet superconductivity due to antiferromagnetic spin-fluctuation in Sr_2RuO_4
• Is Sr2RuO4 a Chiral P-Wave Superconductor?
• Evidence for a pressure-induced antiferromagnetic quantum critical point in intermediate valence UTe2
• Crossover from weak to strong pairing in unconventional superconductors
• 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
• 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2
• Spin fluctuations in Sr2RuO4 from polarized neutron scattering: implications for superconductivity
• Vortex lattices and broken time reversal symmetry in the topological superconductor UPt3
• Anisotropic critical magnetic fluctuations in the ferromagnetic superconductor UCoGe
• Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor UTe${}_2$
• Orbital-selective Kondo entanglement and antiferromagnetic order in USb${}_2$
• Orbital-selective Kondo-lattice and enigmatic f-electrons emerging from inside the antiferromagnetic phase of a heavy fermion
• Magnetic quantum critical point and superconductivity in UPt3 doped with Pd
• Horizontal Line Nodes in Sr2RuO4 Proved by Spin Resonance
• Spin gap and L modulated intensity at the low-energy incommensurate magnetic fluctuations in the superconducting state of Sr2RuO4
• Nature of the spin resonance mode in CeCoIn${}_5$
• Electronic Correlation Induced Expansion of Compensated Electron and Hole Fermi Pockets in delta-Plutonium
• Absence of a large superconductivity-induced gap in magnetic fluctuations of Sr2RuO4

Cited by in corpus (62)

• 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${}_2$
• Magnetic-field sensitive charge density wave orders in the superconducting phase of UTe2
• Resonance from antiferromagnetic spin fluctuations for superconductivity in UTe${}_2$
• Field-induced tuning of the pairing state in a superconductor
• Chiral superconductivity in UTe2 probed by anisotropic low-energy excitations
• Spatially inhomogeneous superconductivity in UTe2
• Comparison of two superconducting phases induced by a magnetic field in UTe2
• $c$-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
• Change of superconducting character in UTe2induced by magnetic field
• 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
• Slow Electronic Dynamics in the Paramagnetic State of UTe${}_2$
• Quantum-geometry-induced anapole superconductivity
• Superconducting-Spin Reorientation in Spin-Triplet Multiple Superconducting Phases of UTe2
• Unconventional fully-gapped superconductivity in the heavy-fermion metal CeCu${}_2$Si${}_2$
• Feedback of superconductivity on the magnetic excitation spectrum of UTe${}_2$
• Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe${}_2$
• Ubiquitous Spin Freezing in the Superconducting State of UTe2
• Interaction-induced topological phase transition and Majorana edge states in low-dimensional orbital-selective Mott insulators
• Expansion of the high field-boosted superconductivity in UTe2 under pressure
• Thermodynamic signatures of short-range magnetic correlations in UTe${}_2$
• Possible Coexistence of Antiferromagnetic and Ferromagnetic Spin Fluctuations in the Spin-triplet Superconductor UTe2 Revealed by 125Te NMR under Pressure
• Magnetic reshuffling and feedback on superconductivity in UTe2 under pressure
• Pressure-induced structural phase transition and new superconducting phase in UTe2
• Spin triplet superconductivity driven by finite momentum spin fluctuations
• Pairing symmetries of multiple superconducting phases in UTe2: Competition between ferromagnetic and antiferromagnetic fluctuations
• Nonreciprocal Meissner response in parity-mixed superconductors
• Chiral Superconductivity in UTe${}_2$ via Emergent $C_4$ Symmetry and Spin Orbit Coupling
• Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe${}_2$
• Identifying f-electron symmetries of UTe2 with O-edge resonant inelastic X-ray scattering
• Anisotropic signatures of the electronic correlations in the electrical resistivity of UTe${}_2$
• Multiple superconducting phases in heavy-fermion metals
• Superconducting piezoelectric effect
• Drastic change in magnetic anisotropy of UTe2 under pressure revealed by 125Te-NMR
• Low-temperature Magnetic Fluctuations Investigated by ${}^{125}$Te-NMR on the Uranium-based Superconductor UTe${}_2$
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
• Anisotropic Enhancement of Lower Critical Field in Ultraclean Crystals of Spin-Triplet Superconductor UTe2
• Anisotropic field-induced changes in the superconducting order parameter of UTe2
• Incommensurate antiferromagnetism in UTe2 under pressure
• Suppression of ferromagnetism governed by a critical lattice parameter in CeTiGe$\_3$ with hydrostatic pressure or V substitution
• Quasi-uniaxial pressure induced superconductivity in stoichiometric compound UTe${}_2$
• ${\mu }^{+}$ Knight Shift in UTe${}_2$: Evidence for Relocalization in a Kondo Lattice
• An emerging global picture of heavy fermion physics
• Theoretical studies on off-axis phase diagrams and Knight shifts in UTe${}_2$ -- Tetra-critical point, d-vector rotation, and multiple phases
• Intrinsic low-temperature magnetic properties on the ultra-clean UTe${}_2$ with $T_{\mathrm{c}}$ = 2.1 K revealed by ${}^{125}$Te NMR
• Dramatic elastic response at the critical end point in UTe${}_2$
• Quenched randomness, thermal fluctuations and reentrant superconductivity: application to UTe${}_2$
• Emergent ferromagnetic ladder excitations in heavy fermion superconductor CeSb${}_2$
• Lattice Instability of UTe${}_2$ Studied by Ultrasonic Measurements
• Electron-beam Floating-zone Refined UCoGe
• 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
• On-chip quantum sensing of Kondo spins in a high-mobility quasi-one-dimensional nanoconstriction
• Boosted magnetic fluctuations at the onset of superconductivity in UTe${}_2$ beyond 40 T
• Electronic structure of UTe${}_2$ under pressure