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= 0.34) iron-pnictide superconductor

Title= 0.34) iron-pnictide superconductor
Publication TypeJournal Article
Year of Publication2014
AuthorsCho, K, Konczykowski, M, Murphy, J, Kim, H, Tanatar, MA, Straszheim, WE, Shen, B, Wen, HH, Prozorov, R
JournalPhysical Review B
Date Published09
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000342158600005
Keywordsimpurities, scattering, state, unconventional superconductors

= 3), indicating almost exponential attenuation and thus a robust full superconducting gap. For the x = 0.19 composition, which exhibits coexistence of superconductivity and long-range magnetism, the suppression of T-c was much more rapid, and the exponent n decreased toward the s(+/-) dirty limit of n = 2. In this sample, the irradiation also suppressed the temperature of structural/magnetic transition T-sm from 103 to 98 K, consistent with the itinerant nature of the long-range magnetic order. Our results suggest that underdoped compositions, especially in the coexisting regime, are most susceptible to nonmagnetic scattering and imply that in multiband Ba1-xKxFe2As2 superconductors, the ratio of the interband to intraband pairing strength, as well as the related gap anisotropy, increases upon the departure from the optimal doping.

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