Non-linear Temperature Dependence of Resistivity in Single Crystalline Ag${}_5$Pb${}_2$O${}_6$

Abstract

We measured electrical resistivity, specific heat and magnetic susceptibility of single crystals of highly conductive oxide Ag_5Pb_2O_6, which has a layered structure containing a Kagome lattice. Both the out-of-plane and in-plane resistivity show T^2 dependence in an unusually wide range of temperatures up to room temperature. This behavior cannot be accounted for either by electron correlation or by electron-phonon scattering with high frequency optic phonons. In addition, a phase transition with a large diamagnetic signal was found in the ac susceptibility, which strongly suggests the existence of a superconducting phase below 48 mK.

5 pages, 5 figures; accepted for publication in Physcal Review B; Revised version: small correction in the caption of Fig.2

References in corpus (4)

• Specific heat in the superconducting and normal state (2-300 K, 0-16 Teslas), and magnetic susceptibility of the 38-K superconductor MgB2: evidence for a multicomponent gap
• Single crystal MgB2 with anisotropic superconducting properties
• Superconducting properties of well-shaped MgB2 single crystal
• Colossal Electric Conductivity in Ag-defect Ag5Pb2O6

Cited by in corpus (7)

• Exceptional type-I superconductivity of the layered silver oxide Ag${}_5$Pb${}_2$O${}_6$
• Nearly free electrons in the layered oxide superconductor Ag5Pb2O6
• Anomalous electric conductions in KSbO3-type metallic rhenium oxides
• Electronic band structure and Fermi surface of Ag${}_5$Pb${}_2$O${}_6$
• Element-Specific Orbital Character in a Nearly-Free-Electron Superconductor Ag${}_5$Pb${}_2$O${}_6$ Revealed by Core-Level Photoemission
• Properties of the Nearly Free Electron Superconductor Ag5Pb2O6 Inferred from Fermi Surface Measurements
• Transport properties of Ag5Pb2O6: a three-dimensional electron-gas-like system with low-carrier-density