Chemical trends of superconducting properties in pyrochlore oxides

Abstract

Chemical trends of fundamental superconducting parameters and normal-state properties are described for a family of pyrochlore oxide superconductors. Particularly, the change of Tc from 1.0 K for alpha-pyrochlore Cd2Re2O7 to 3.3 K (A = Cs), 6.3 K (Rb), and 9.6 K (K) for beta-pyrochlore AOs2O6 is discussed on the basis of the conventional BCS scheme. Enhanced Tc and anomalous features observed for KOs2O6 are ascribed to low-energy phonons probably coming from the rattling of the K cations.

arXiv comment8 pages, to be published in the Proceedings of M2S-HTSC2006 (Physica C)

References in corpus (23)

• Superconductivity at 1 K in Cd2Re2O7
• New Pyrochlore Oxide Superconductor RbOs2O6
• New beta-Pyrochlore Oxide Superconductor CsOs2O6
• Crystal structure of the pyrochlore oxide superconductor KOs${}_2$O${}_6$
• Correlation Effects and Structural Dynamics in the $\beta$-Pyrochlore Superconductor KOs${}_2$O${}_6$
• Electronic structure of the pyrochlore metals Cd2Os2O7 and Cd2Re2O7
• Possible spin-triplet $f$-wave pairing due to disconnected Fermi surfaces in Na${}_x$CoO${}_2\cdot y$H${}_2$O
• Mass enhancement, correlations, and strong coupling superconductivity in the beta-pyrochlore KOs2O6
• Superconductivity in Geometrically Frustrated Pyrochlore RbOs2O6
• Magnetic and superconducting properties of Cd2Re2O7: Cd NMR and Re NQR
• Crystal growth, structural studies and superconducting properties of beta-pyrochlore KOs2O6
• Second Anomaly in the Specific Heat of beta-Pyrochlore Oxide Superconductor KOs2O6
• Specific Heat of the beta-Pyrochlore Oxide Superconductors CsOs2O6 and RbOs2O6
• Study of the magnetic penetration depth in RbOs_2O_6
• Superconducting properties of the pyrochlore oxide Cd2Re2O7
• Pressure effects on the transition temperature and the magnetic field penetration depth in the pyrochlore superconductor RbOs_2O_6
• Electronic structure properties and BCS superconductivity in beta-pyrochlore oxides: KOs_2O_6
• Possible Anisotropic Order Parameter in Pyrochlore Superconductor KOs${}_2$O${}_6$ Probed by Muon Spin Rotation
• Synthesis of superconducting pyrochlore RbOs2O6
• A second phase transition and superconductivity in the beta-pyrochlore oxide KOs2O6
• High Pressure Effects on Superconductivity in the beta-pyrochlore Oxides AOs2O6 (A=K, Rb, Cs)
• Evidence for charged critical behavior in the pyrochlore superconductor RbOs2O6
• Anomalous Flux Pinning in ?-Pyrochlore Oxide Superconductor KOs2O6

Cited by in corpus (10)

• Rattling-Induced Superconductiviy in the Beta-Pyrochlore Oxides AOs2O6
• Strong coupling superconductivity mediated by three-dimensional anharmonic phonons
• Rattling and Superconducting Properties of the Cage Compound GaxV2Al20
• Superconducting Transition in the $\beta$-Pyrochlore AOs${}_2$O${}_6$ (A=Cs, Rb, K) under Pressure
• A new triclinic modification of the pyrochlore-type KOs2O6 superconductor
• Structural and Superconducting Properties of RbOs2O6 Single Crystals
• Superconducting and Structural Transitions in the β-Pyrochlore Oxide KOs2O6 under High Pressure
• Large and homogeneous mass enhancement in the rattling-induced superconductor KOs${}_2$O${}_6$
• Upper critical field and de Haas-van Alphen oscillations in KOs${}_2$O${}_6$ measured in a hybrid magnet
• Superconductivity and Rattling under High Pressure in the beta-Pyrochlore Oxide RbOs2O6