Superconductivity and Magnetic Fluctuations in Cd2Re2O7 via Cd Nuclear Magnetic Resonance and Re Nuclear Quadrupole Resonance
O. Vyaselev, K. Arai, K. Kobayashi, J. Yamazaki, K. Kodama, M. Takigawa, M. Hanawa, Z. Hiroi
DOI 10.1103/PhysRevLett.89.017001 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report Cd nuclear magnetic resonance (NMR) and Re nuclear quadrupole resonance (NQR) studies on Cd2Re2O7, the first superconductor among pyrochlore oxides (Tc≃1K). The 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 follows the weak-coupling BCS theory with nearly isotropic energy gap. The results of Cd NMR point to a moderate ferromagnetic enhancement at high temperatures followed by a rapid decrease of the density of states below the structural transition temperature of 200 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Cd2Re2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure not reported | unknown |
| Cd2Re2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.98 | Pressure unresolved | midpoint |
Similar papers
Low-temperature structural change and magnetic anomaly in superconducting Cd2Re2O7
similarity 0.97Hironori Sakai et al.
Source status unknown — claims are unverified
Superconductivity at 1 K in Cd2Re2O7
similarity 0.96M. Hanawa et al.
Source status unknown — claims are unverified
Pressure Effects on the Transition Temperature and the Magnetic Field Penetration Depth in the Pyrochlore Superconductor RbOs2O6
similarity 0.96R. Khasanov et al.
Source status unknown — claims are unverified
Superconductivity in the correlated pyrochlore Cd2Re2O7
similarity 0.96R. Jin et al.
Source status unknown — claims are unverified
Order-disorder-order phase transitions in the pyrochlore superconductor Cd2Re2O7
similarity 0.95C. S. Knee et al.
Source status unknown — claims are unverified
Superconducting to spin-glass state transformation in β-pyrochlore KxOs2O6
similarity 0.95C. C. Lee et al.
Source status unknown — claims are unverified