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Title: Effect of Electron Irradiation on Superconductivity in Single Crystals of Ba ( Fe 1 x Ru x ) 2 As 2 ( x = 0.24 )

Journal Article · · Physical Review. X

A single crystal of isovalently substituted Ba(Fe1-xRux)2As2 (x=0.24) is sequentially irradiated with 2.5 MeV electrons up to a maximum dose of 2.1×1019 e-/cm2. 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 Tc decreases and the residual resistivity ρ0 increases. We find that electron irradiation leads to the fastest suppression of Tc compared to other types of artificially introduced disorder, probably due to the strong short-range potential of the pointlike irradiation defects. As a result, a more detailed analysis within a multiband scenario with variable scattering potential strength shows that the observed Tc versus ρ0 is fully compatible with s± pairing, in contrast to earlier claims that this model leads to a too rapid suppression of Tc with scattering.

Research Organization:
Ames Lab., Ames, IA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358; FG02-05ER46236; AC0298CH1088; 11-11-0121; AC02-98CH1088; AC02-98CH10886; AC02-06CH11357
OSTI ID:
1181610
Alternate ID(s):
OSTI ID: 1166898; OSTI ID: 1210285; OSTI ID: 1223322
Report Number(s):
IS-J-8486; PRXHAE; 041032
Journal Information:
Physical Review. X, Journal Name: Physical Review. X Vol. 4 Journal Issue: 4; ISSN 2160-3308
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 59 works
Citation information provided by
Web of Science

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