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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 )

A single crystal of isovalently substituted Ba(Fe 1-xRu x) 2As 2 (x=0.24) is sequentially irradiated with 2.5 MeV electrons up to a maximum dose of 2.1×10 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 ρ0 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. As a result, a more detailed analysis within a multiband scenario with variable scattering potential strength shows that the observed T c versus ρ 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.
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [4]
  1. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  2. Ecole Polytechnique, Palaiseau cedex (France)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of Florida, Gainesville, FL (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 2160-3308; PRXHAE; ArticleNumber: 041032
Grant/Contract Number:
AC02-07CH11358; FG02-05ER46236; AC02-98CH1088; AC0298CH1088; 11-11-0121; AC02-98CH10886; AC02-06CH11357
Published Article
Journal Name:
Physical Review. X
Additional Journal Information:
Journal Volume: 4; Journal Issue: 4; Journal ID: ISSN 2160-3308
American Physical Society
Research Org:
Ames Laboratory (AMES), Ames, IA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC); Center for Emergent Superconductivity (CES)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
36 MATERIALS SCIENCE; condensed matter physics; strongly correlated materials; superconductivity; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; phonons; thermal conductivity; energy storage (including batteries and capacitors); defects; spin dynamics
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1166898; OSTI ID: 1210285; OSTI ID: 1223322