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, I. Nowik, I. Felner, V.P.S. Awana, K. Yamaura, E., Takayama-Muromachi
TL;DR
This study demonstrates that a small amount of nonmagnetic Zn impurity drastically suppresses superconductivity in LaFeAsO0.85, supporting the s+/- pairing model for Fe pnictide superconductors.
Contribution
It provides experimental evidence that nonmagnetic impurities significantly suppress Tc, highlighting impurity scattering effects in Fe-based superconductors.
Findings
Zn doping causes drastic Tc suppression at 3 at.%
Superconductivity suppression is due to impurity scattering, not loss of metallicity
Supports the s+/- pairing model for Fe pnictide superconductors
Abstract
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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Taxonomy
TopicsIron-based superconductors research · Corporate Taxation and Avoidance · Intellectual Capital and Performance Analysis