Single-component superconducting state in UTe2 at 2 K

Abstract

UTe2 is a newly-discovered unconventional superconductor wherein multicomponent topological superconductivity is anticipated based on the presence of two superconducting transitions and time-reversal symmetry breaking in the superconducting state. The observation of two superconducting transitions, however, remains controversial. Here we demonstrate that UTe2 single crystals displaying an optimal superconducting transition temperature at 2 K exhibit a single transition and remarkably high quality supported by their small residual heat capacity in the superconducting state and large residual resistance ratio. Our results shed light on the intrinsic superconducting properties of UTe2 and bring into question whether UTe2 is a multicomponent superconductor at ambient pressure.

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Cited by in corpus (60)

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• Quasi-2D Fermi surface in the anomalous superconductor UTe2
• Single-Component Superconductivity in UTe${}_2$ at Ambient Pressure
• $c$-axis transport in UTe${}_2$: Evidence of Three Dimensional Conductivity Component
• A review of UTe${}_2$ at high magnetic fields
• The fate of time-reversal symmetry breaking in UTe2
• Fully gapped pairing state in spin-triplet superconductor UTe${}_2$
• Change of superconducting character in UTe2induced by magnetic field
• Field Induced Multiple Superconducting Phases in UTe2 along Hard Magnetic Axis
• Enhanced triplet superconductivity in next generation ultraclean UTe2
• Microscopic imaging homogeneous and single phase superfluid density in UTe${}_2$
• Quantum interference between quasi-2D Fermi surface sheets in UTe2
• Heat capacity double transitions in time-reversal symmetry broken superconductors
• Ubiquitous Spin Freezing in the Superconducting State of UTe2
• Possible Coexistence of Antiferromagnetic and Ferromagnetic Spin Fluctuations in the Spin-triplet Superconductor UTe2 Revealed by 125Te NMR under Pressure
• Thermodynamic and electrical transport properties of UTe${}_2$ under uniaxial stress
• Longitudinal spin fluctuations driving field-reinforced superconductivity in UTe${}_2$
• Molten Salt Flux Liquid Transport Method for Ultra Clean Single Crystals UTe2
• Pairing symmetries of multiple superconducting phases in UTe2: Competition between ferromagnetic and antiferromagnetic fluctuations
• Spontaneous time-reversal symmetry breaking by disorder in superconductors
• Monolayer superconductivity and tunable topological electronic structure at the Fe(Te,Se)/Bi2Te3 interface
• Identifying f-electron symmetries of UTe2 with O-edge resonant inelastic X-ray scattering
• Cascade of vestigial orders in two-component superconductors: nematic, ferromagnetic, s-wave charge-4e, and d-wave charge-4e states
• Anomalous vortex dynamics in spin-triplet superconductor UTe${}_2$
• Pair Wavefunction Symmetry in UTe2 from Zero-Energy Surface State Visualization
• 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
• Thermodynamic transitions and topology of spin-triplet superconductivity: Application to UTe${}_2$
• Absence of a Bulk Thermodynamic Phase Transition to a Density Wave Phase in UTe2
• Resonant Ultrasound Spectroscopy for Irregularly-Shaped Samples and its Application to Uranium Ditelluride
• Anisotropic Enhancement of Lower Critical Field in Ultraclean Crystals of Spin-Triplet Superconductor UTe2
• Theory of the low- and high-field superconducting phases of UTe${}_2$
• Incommensurate antiferromagnetism in UTe2 under pressure
• Anisotropic field-induced changes in the superconducting order parameter of UTe2
• Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe${}_2$
• Quasi-uniaxial pressure induced superconductivity in stoichiometric compound UTe${}_2$
• Absence of a bulk charge density wave signature in x-ray measurements of UTe${}_2$
• Anisotropic paramagnetic response of topological Majorana surface states in the superconductor ${\text{UTe}}_2$
• Spectroscopic evidence of symmetry breaking in the superconducting vortices of UTe2
• Low temperature specific heat and thermal conductivity in superconducting UTe2
• ${\mu }^{+}$ Knight Shift in UTe${}_2$: Evidence for Relocalization in a Kondo Lattice
• Nodal superconducting gap structure and topological surface states of UTe${}_2$
• Hydrostatic pressure studies on non-superconducting UTe2
• Pair-Kondo effect: a mechanism for time-reversal broken superconductivity in UTe${}_2$
• Self-reconstruction of order parameter in spin-triplet superconductor UTe${}_2$
• Magnetic signatures of pressure-induced multicomponent superconductivity in UTe${}_2$
• Majorana multipole response with magnetic point group symmetry
• Thermal conductivity of nonunitary triplet superconductors: application to UTe${}_2$
• Microscopic theory of pair density waves in spin-orbit coupled Kondo lattice
• Reciprocal and nonreciprocal paraconductivity in bilayer multiphase superconductors
• Higher-order topological phases for time-reversal-symmetry breaking superconductivity in UTe${}_2$
• Intrinsic defect intolerance in the ultra-pure metal PtSn${}_4$
• Magnetic edge fields in UTe${}_2$ near zero background fields
• Revealing isotropic abundant low-energy excitations in UTe${}_2$ through complex microwave surface impedance
• Axionic $p+is$ superconductivity from two pairing channels
• Spin-lattice relaxation for point-node-like s-wave superconductivity in f-electron systems
• Theoretical Study of Impurity Effects on Superconductivity in UTe2
• Pressure-enhanced $f$-electron orbital weighting in UTe2 mapped by quantum interferometry