Magnetic and superconducting properties of Cd2Re2O7: Cd NMR and Re NQR

Abstract

We report Cd NMR and Re NQR studies on Cd2Re2O7, the first superconductor among pyrochlore oxides Tc=1 K. Re NQR spectrum at zero magnetic field below 100 K rules out any magnetic or charge order. The spin-lattice relaxation rate below Tc exhibits a pronounced coherence peak and behaves within the weak-coupling BCS theory with nearly isotropic energy gap. Cd NMR results point to moderate ferromagnetic enhancement at high temperatures followed by rapid decrease of the density of states below the structural transition temperature of 200 K.

arXiv comment4 pages, 4 figures

References in corpus (5)

• Superconductivity at 1 K in Cd2Re2O7
• Spin Driven Jahn-Teller Distortion in a Pyrochlore system
• Superconductivity in the Correlated Pyrochlore Cd_2Re_2O_7
• Fluctuation Effects on the Physical Properties of Cd2Re2O7 Near 200 K
• Quasiparticle Excitation in the Superconducting Pyrochlore Cd2Re2O7 Probed by Muon Spin Rotation

Cited by in corpus (31)

• Extremely strong-coupling superconductivity and anomalous lattice properties in the beta-pyrochlore oxide KOs2O6
• A parity-breaking electronic nematic phase transition in the spin-orbit coupled metal Cd${}_2$Re${}_2$O${}_7$
• Metallic "Ferroelectricity" in the Pyrochlore Cd2Re2O7
• Order parameter in superconductors with non-degenerate bands
• Low Temperature Symmetry of Pyrochlore Oxide Cd2Re2O7
• Electric Toroidal Quadrupoles in Spin-Orbit Coupled Metal Cd${}_2$Re${}_2$O${}_7$
• Chemical trends of superconducting properties in pyrochlore oxides
• Pyrochlore Oxide Superconductor Cd2Re2O7 Revisited
• Specific Heat of the beta-Pyrochlore Oxide Superconductors CsOs2O6 and RbOs2O6
• Structural Ordering and Symmetry Breaking in Cd_2Re_2O_7
• Structural Order Parameter in the Pyrochlore Superconductor Cd2Re2O7
• The nature of the tensor order in Cd2Re2O7
• Field-induced quasiparticle excitations in novel type II superconductors
• Correlations and Semimetallic Behaviors in Pyrochlore Oxide Cd2Re2O7
• Tunnelling between non-centrosymmetric superconductors with significant spin-orbit splitting studied theoretically within a two-band treatment
• Evidence for s-wave superconductivity in the new beta-pyrochlore oxide RbOs2O6
• Strongly Anisotropic s-Wave Gaps in Exotic Superconductors
• Evidence of an improper displacive phase transition in Cd${}_2$Re${}_2$O${}_7$ via time-resolved coherent phonon spectroscopy
• Successive spatial symmetry breaking under high pressure in the spin-orbit-coupled metal Cd2Re2O7
• The electrical properties of Cd2Re2O7 under pressure
• Extremely large magnetoresistance in the hourglass Dirac loop chain metal β-ReO${}_2$
• Split Fermi Surfaces of the Spin-Orbit-Coupled Metal Cd2Re2O7 Probed by de Haas-van Alphen Effect
• First-principles studies of spin-orbital physics in pyrochlore oxides
• Low-Temperature Phase of the Cd${}_2$Re${}_2$O${}_7$ Superconductor: Ab initio Phonon Calculations and Raman Scattering
• Using Josephson junctions to determine the pairing state of superconductors without crystal inversion symmetry
• Variation in Superconducting Symmetry against Pressure on Noncentrosymmetric Superconductor Cd${}_2$Re${}_2$O${}_7$ Revealed by ${}^{185/187}$Re Nuclear Quadrupole Resonance
• High-pressure Raman study on the superconducting pyrochlore oxide Cd2Re2O7
• Spin-orbit-coupled metal candidate PbRe2O6
• Domain Control by Adjusting Anisotropic Stress in Pyrochlore Oxide Cd2Re2O7
• Upper critical field and de Haas-van Alphen oscillations in KOs${}_2$O${}_6$ measured in a hybrid magnet
• Structural order parameter and itinerant electron magnetism in Cd2Re2O7