Effect of Lead Substitution on LaO0.5F0.5BiS2

Abstract

We examined Lead (Pb) Substitution effect on a single crystal of a layered superconductor LaO0.5F0.5BiS2. Pb concentration dependence of the lattice constant showed slight anomaly at about 8% and 9% substitution of Pb for Bi. These samples showed the enhancement of the superconducting transition temperature and the superconducting volume fraction. Furthermore, these samples showed the anomaly in the temperature dependence of the resistivity at about 150K. These results were not observed in Pb substituted NdO0.7F0.3BiS2. Therefore, the enhancement of the superconducting properties by Pb substitution is related to the structural instability for the pale perturbation in LaO0.5F0.5BiS2.

8 pages, 4 figures, to be published in Solid State Communications

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Cited by in corpus (2)

• Bulk superconductivity in Pb-substituted BiS${}_2$-based compounds studied by hard-x-ray spectroscopy
• Pb Substitution Effects on Lattice and Electronic System of the BiS2-based Superconductors La(O F)BiS2