Role of magnetism in superconductivity of BaF e2 A s2: Study of 5d Au-doped crystals

Li Li, Huibo Cao, Michael A. McGuire, Jungsoo S. Kim, Greg R. Stewart, Athena S. Sefat

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13 Scopus citations

Abstract

We investigate properties of BaFe2As2 (122) single crystals upon gold doping, which is the transition metal with the highest atomic weight. The Au substitution into the FeAs-planes of 122 crystal structure (Au-122) is only possible up to a small amount of ∼3%. We find that 5d is more effective in reducing magnetism in 122 than its counter 3d Cu, and this relates to superconductivity. We provide evidence of short-range magnetic fluctuations and local lattice inhomogeneities that may prevent strong percolative superconductivity in Ba(Fe1-xAux)2As2.

Original languageEnglish
Article number094504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number9
DOIs
StatePublished - Sep 9 2015

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