Exceptional type-I superconductivity of the layered silver oxide Ag$_5$Pb$_2$O$_6$

Shingo Yonezawa; Yoshiteru Maeno

doi:10.1103/PhysRevB.72.180504

paper

Exceptional type-I superconductivity of the layered silver oxide Ag $_{5}$ Pb $_{2}$ O $_{6}$

arXiv:cond-mat/0509018 · doi:10.1103/PhysRevB.72.180504

Abstract

We report zero-resistivity transition and the details of magnetic transition of a layered silver oxide Ag $_{5}$ Pb $_{2}$ O $_{6}$ single crystal, which make definitive evidence of superconductivity in this compound. In the AC susceptibility of a mono-crystal, we observed large supercooling, as well as positive peaks in the real part of the susceptibility indicating the reversibility of magnetic process. These observations reveal that Ag $_{5}$ Pb $_{2}$ O $_{6}$ is probably the first oxide that shows type-I superconductivity. Evaluation of the superconducting parameters not only gives confirming evidence of type-I superconductivity, but also indicates that it is a dirty-limit superconductor. We also analyze supercooling to determine the upper limit of the Ginzburg-Landau parameter.

arXiv commentv2: PACS numbers are added

References in corpus (1)

Non-linear Temperature Dependence of Resistivity in Single Crystalline Ag $_{5}$ Pb $_{2}$ O $_{6}$

Exceptional type-I superconductivity of the layered silver oxide Ag5​Pb2​O6​

Abstract

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Exceptional type-I superconductivity of the layered silver oxide Ag $_{5}$ Pb $_{2}$ O $_{6}$