Large Reduction in the $a$-axis Knight Shift on UTe${}_2$ with $T_{\mathrm{c}}$ = 2.1 K

Abstract

Spin susceptibility in the superconducting (SC) state was measured in the higher-quality sample of uranium-based superconductor UTe${}_2$ by using Knight-shift measurements for a magnetic field $H$ along all three crystalline axes. In the higher-quality sample, the SC transition temperature $T_{\mathrm{c}}$ is about 2.1 K, and the residual electronic term in the specific heat is almost zero. The NMR linewidth becomes narrower and is almost half of that in the previous sample with $T_{\mathrm{c}}\sim 1.6$ K when $H\parallel a$ and $c$. Although the Knight-shift behavior was not so different from the previous results for $H\parallel b$, and $c$, a large reduction in Knight shift along the $a$ axis was observed, in contrast with the previous $a$-axis Knight shift result. We discuss the origin of the difference between the previous and present results, and the possible SC state derived from the present results.

7 pages, 6 figures, including supplemental materials

References in corpus (7)

• Review of U-based Ferromagnetic Superconductors: Comparison between UGe2, URhGe, and UCoGe
• Unconventional Superconductivity in UTe2
• 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2
• Superconducting order parameter in UTe${}_2$ determined by Knight shift measurement
• Anisotropic response of spin susceptibility in the superconducting state of UTe${}_2$ probed with ${}^{125}$Te-NMR measurement
• Effect of uranium deficiency on normal and superconducting properties in unconventional superconductor UTe${}_2$
• Inhomogeneous Superconducting State Probed by ${}^{125}$Te NMR on UTe$_2

Cited by in corpus (49)

• Quasi-2D Fermi surface in the anomalous superconductor UTe2
• Single-Component Superconductivity in UTe${}_2$ at Ambient Pressure
• A review of UTe${}_2$ at high magnetic fields
• Fully gapped pairing state in spin-triplet superconductor UTe${}_2$
• Absence of Spontaneous Magnetic Fields Due to Time-Reversal Symmetry Breaking in Bulk Superconducting UTe2
• Enhanced triplet superconductivity in next generation ultraclean UTe2
• Discovery of magnetic phase transitions in heavy-fermion superconductor CeRh${}_2$As${}_2$
• Quantum interference between quasi-2D Fermi surface sheets in UTe2
• 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
• Pair Wavefunction Symmetry in UTe2 from Zero-Energy Surface State Visualization
• Thermodynamic transitions and topology of spin-triplet superconductivity: Application to UTe${}_2$
• Clear Reduction in Spin Susceptibility and Superconducting Spin Rotation for $H\parallel a$ in the Early-Stage Sample of Spin-Triplet Superconductor UTe${}_2$
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
• Incommensurate antiferromagnetism in UTe2 under pressure
• Anisotropic field-induced changes in the superconducting order parameter of UTe2
• Unconventional $s$-Wave Pairing with Point-Node-Like Gap Structure in UTe${}_2$
• Anisotropic paramagnetic response of topological Majorana surface states in the superconductor ${\text{UTe}}_2$
• Nodal superconducting gap structure and topological surface states of UTe${}_2$
• 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
• Spectroscopic evidence of symmetry breaking in the superconducting vortices of UTe2
• Observation of Persistent Zero Modes and Superconducting Vortex Doublets in UTe${}_2$
• Dynamical Majorana Ising spin response in a topological superconductor-magnet hybrid by microwave irradiation
• 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${}_2$
• Uniform electronic states and $s$-wave superconductivity in a strongly disordered high-entropy compound (RuRhPdIr)${}_{0.6}$Pt${}_{0.4}$Sb
• Quasiparticle interference and spectral function of the UTe${}_2$ superconductive surface band
• Microscopic theory of pair density waves in spin-orbit coupled Kondo lattice
• Magnetic signatures of pressure-induced multicomponent superconductivity in UTe${}_2$
• Thermal conductivity of nonunitary triplet superconductors: application to UTe${}_2$
• Dramatic elastic response at the critical end point in UTe${}_2$
• Observation of vortex stripes in UTe${}_2$
• Two-dimensional flat band on the (011) surface of UTe${}_2$: Implication for STM measurements with a superconducting tip
• Reciprocal and nonreciprocal paraconductivity in bilayer multiphase superconductors
• Higher-order topological phases for time-reversal-symmetry breaking superconductivity in UTe${}_2$
• Magnetic edge fields in UTe${}_2$ near zero background fields
• $b$-axis and $c$-axis Knight shift measurements in the superconducting state on ultraclean UTe${}_2$ with $T_c$ = 2.1 K
• Slow magnetic quantum oscillations in the c-axis magnetoresistance of UTe${}_2$
• A unified theoretical framework for Kondo superconductors: Periodic Anderson impurities with attractive pairing and Rashba spin-orbit coupling
• Visualizing the Odd-parity Superconducting Order Parameter and its Quasiparticle Surface Band in UTe2
• Nodal Superconductivity of UTe${}_2$ Probed by Field-Angle-Resolved Specific Heat on a Crystal with $T_{\mathrm{c}}=2.1$ K
• Quasiparticle Interference of Spin-Triplet Superconductors: Application to UTe${}_2$
• Spin-lattice relaxation for point-node-like s-wave superconductivity in f-electron systems
• Magnetic Field Dependence of the Spin Susceptibility on Conventional s-wave Superconductor LaRu${}_4$P${}_{12}$ Revealed by ${}^{31}$P-NMR and ${}^{139}$La-NMR
• Theoretical Study of Impurity Effects on Superconductivity in UTe2
• Highly Uniform Magnetic and Electronic Environment in Non-Centrosymmetric Superconductor LaRhGe${}_3$
• Raman response of collective modes in multicomponent superconductors
• Unconventional superconductivity emerging along with the strange-metal behavior in UAs2 under pressure