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American Physical Society, Physical review B, 9(92), 2015

DOI: 10.1103/physrevb.92.094504

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Role of magnetism in superconductivity ofBaFe2As2: Study of5dAu-doped crystals

Journal article published in 2015 by Li Li, Huibo Cao ORCID, Michael A. McGuire, Jungsoo S. Kim, Greg R. Stewart, Athena S. Sefat ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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. ; Comment: 6 figs; 9 pages