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Effect of Electron Irradiation on Superconductivity in Single Crystals of Ba(Fe1-xRux)(2)As-2 (x=0.24)

TitleEffect of Electron Irradiation on Superconductivity in Single Crystals of Ba(Fe1-xRux)(2)As-2 (x=0.24)
Publication TypeJournal Article
Year of Publication2014
AuthorsProzorov, R, Konczykowski, M, Tanatar, MA, Thaler, A, Bud'ko, SL, Canfield, PC, Mishra, V, Hirschfeld, PJ
JournalPhysical Review X
Volume4
Pagination041032
Date Published11
Type of ArticleArticle
ISBN Number2160-3308
Accession NumberWOS:000345253200002
Keywordsimpurities, mgb2, penetration depth, temperature
Abstract

A single crystal of isovalently substituted Ba(Fe1-xRux)(2)As-2 (x = 0.24) is sequentially irradiated with 2.5 MeV electrons up to a maximum dose of 2.1 x 10(19) e(-)/cm(2). The electrical resistivity is measured in situ at T = 22 K during the irradiation and ex situ as a function of temperature between subsequent irradiation runs. Upon irradiation, the superconducting transition temperature T-c decreases and the residual resistivity rho(0) increases. We find that electron irradiation leads to the fastest suppression of T-c compared to other types of artificially introduced disorder, probably due to the strong short-range potential of the pointlike irradiation defects. A more detailed analysis within a multiband scenario with variable scattering potential strength shows that the observed T-c versus rho(0) is fully compatible with s(+) pairing, in contrast to earlier claims that this model leads to a too rapid suppression of T-c with scattering.

DOI10.1103/PhysRevX.4.041032
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