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arxiv: 0911.2975 · v1 · submitted 2009-11-16 · ❄️ cond-mat.supr-con · cond-mat.str-el

Drastic suppression of the superconductivity of LaFeAsO0.85 by a nonmagnetic impurity

Y.F. Guo , Y.G. Shi , S. Yu , A.A. Belik , Y. Matsushita , M. Tanaka , Y. Katsuya , K. Kobayashi
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I. Nowik I. Felner V.P.S. Awana K. Yamaura E. Takayama-Muromachi
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classification ❄️ cond-mat.supr-con cond-mat.str-el
keywords drasticimpuritylafeaso0superconductorsuppressioncauseddopedelectrical
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We observed a drastic Tc suppression caused by no more than 3 at.% of Zn doped to the optimized superconductor LaFeAsO0.85 (Tc = 26 K). The electrical resistivity and magnetic susceptibility measurements suggested that it is likely due to impurity scatterings rather than losing the metallic nature, seeming to support the s+/- pairing model proposed for the Fe pnictide superconductor.

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