Inhomogeneous Superconductivity in BaPb1−xBixO3

被引：0
|
作者：
P. Giraldo-Gallo
Hanoh Lee
M. R. Beasley
T. H. Geballe
I. R. Fisher
机构：
[1] Stanford University,Geballe Laboratory for Advanced Materials and Department of Physics
[2] Stanford University,Geballe Laboratory for Advanced Materials and Department of Applied Physics
来源：
Journal of Superconductivity and Novel Magnetism | 2013年 / 26卷
关键词：
Bismuthate superconductors; Superconductor-Insulator transition; Disorder; Percolation; Quantum phase transition; Structural phase separation;
D O I：
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中图分类号：
学科分类号：
摘要：
Transport and magnetization measurements of single crystas of BaPb1−xBixO3, for Bi compositions spanning the superconducting phase diagram, show signatures of granular and inhomogeneous superconductivity, possibly associated with the nanoscale structural phase separation found for compositions around optimal doping. The material exhibits a field-tuned superconductor-to-insulator transition for Bi compositions 0.24≤x≤0.28. For optimally doped samples (x≈0.25), the magnetoresistance curves show scaling, suggesting some kind of critical behavior.
引用
收藏
页码：2675 / 2678
页数：3
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