Magnetism, Superconductivity and Stoichiometry in Single Crystals of Fe1+y(Te1-xSx)z
Rongwei Hu, Emil S. Bozin, C. Petrovic
TL;DR
This study synthesizes high-quality Fe1+y(Te1-xSx)z single crystals and explores how their magnetic and superconducting properties depend on stoichiometry and composition, revealing coexistence and competition between magnetic order and superconductivity.
Contribution
It provides a detailed analysis of the structural, magnetic, and transport properties of Fe1+y(Te1-xSx)z crystals, highlighting the effects of stoichiometry and sulfur substitution.
Findings
Coexistence of magnetic order and superconductivity for x >= 0.03
Zero resistivity achieved for x >= 0.1
High sensitivity of properties to stoichiometry and vacancies
Abstract
We report synthesis of high quality Fe1+y(Te1-xSx)z single crystals and a comprehensive study of structural, magnetic and transport properties. There is high sensitivity to material stoichiometry which includes vacancies on the Te(S) site. Our results reveal competition and coexistence of magnetic order and percolative superconductivity for x >= 0.03, while zero resistivity is acheived for x >= 0.1.
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