Anisotropic superconducting gap probed by Te NMR in noncentrosymmetric ScTe ( = Fe, Co)
arXiv:2506.02484 · doi:10.1103/PhysRevB.111.214502
Abstract
The superconducting gap symmetry is investigated by Te NMR measurements on ScTe ( = Fe, Co) without spatial inversion symmetry. The spin susceptibility obtained from the Knight shift is suppressed below the superconducting transition temperature, while leaving a finite value down to the lowest temperature ( K). The nuclear spin-lattice relaxation rate follows a power law against temperature without showing a coherence peak characteristic of the isotropic gap. The result implies a pairing admixture or a residual density of states under magnetic field. The normal metallic state has a Korringa scaling relation between and the Knight shift, reflecting a weak electron correlation.
arXiv comment7 pages, 7 figures
References in corpus (33)
- Heavy fermion superconductivity and magnetic order in non-centrosymmetric
- Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
- Superconductivty without inversion symmetry: MnSi versus CePt_3Si
- Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
- Majorana Fermions and Topology in Superconductors
- Evidence for time-reversal symmetry breaking in the non-centrosymmetric superconductor LaNiC
- Superconductivity in metal rich Li-Pd-B ternary Boride
- Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li_2Pt_3B
- CePt3Si: an unconventional superconductor without inversion center
- Electron Correlation and Pairing States in Superconductors without Inversion Symmetry
- Superconductivity in quasi-one-dimensional KCrAs with significant electron correlations
- Spin susceptibility in superconductors without inversion symmetry
- A Non-Centrosymmetric Superconductor with a Bulk 3D Dirac Cone Gapped by Strong Spin Orbit Coupling
- Evidence for a Novel State of Superconductivity in Noncentrosymmetric CePt3Si : A 195Pt-NMR Study
- Disorder-induced topological change of the superconducting gap structure in iron pnictides
- Crystal Symmetry, Electron-Phonon Coupling, and Superconducting Tendencies in LiPdB and LiPtB
- Nuclear Magnetic Relaxation Rate in a Noncentrosymmetric Superconductor
- Enhancement of Superconducting Transition Temperature due to the strong Antiferromagnetic Spin Fluctuations in Non-centrosymmetric Heavy-fermion Superconductor CeIrSi3 :A 29Si-NMR Study under Pressure
- Superconductivity and Magnetism in Non-centrosymmetric System: Application to CePt_3Si
- Superconductivity of the Ternary Boride Li_2Pd_3B Probed by ^{11}B NMR
- Simultaneous Nodal Superconductivity and Time-Reversal Symmetry Breaking in the Noncentrosymmetric Superconductor CaPtAs
- Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in RbCrAs revealed by As NMR and NQR
- Abrupt enhancement of non-centrosymmetry and appearance of the spin-triplet superconducting state in Li_2(Pd_{1-x}Pt_{x})_3B beyond x=0.8
- NMR Observation of Rattling Phonons in the Pyrochlore Superconductor KOs2O6
- NMR and NQR Studies on Non-centrosymmetric Superconductors Re7B3, LaBiPt, and BiPd
- Spin-singlet superconductivity with a full gap in locally non-centrosymmetric SrPtAs
- NMR investigation of spin correlations in BaCo2As2
- Antiferromagnetic spin correlations and pseudogap-like behavior in Ca(Fe1-xCox)2As2 studied by 75As nuclear magnetic resonance and anisotropic resistivity
- Superconductivity in Ternary Scandium Telluride Sc6MTe2 with 3d, 4d, and 5d Transition Metals
- Effects of Impurity Vertex Correction on NMR Coherence Peak in S-Wave Superconductors
- Effect of disorder on the NMR relaxation rate in two-band superconductors
- Ab initio study on magnetism suppression, anharmonicity, rattling mode and superconductivity in ScTe (=Fe, Co, Ni)
- Observation of multigap and coherence peak in the noncentrosymmetric superconductor CaPtAs: As nuclear quadrupole resonance measurement