Large decrease in the critical temperature of superconducting LaFeAsO0.85 compounds doped with 3% atomic weight of nonmagnetic Zn impurities
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
DOI 10.1103/PhysRevB.82.054506 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We observed a large decrease in Tc by no more than 3 at. % of Zn doped into the Tc-optimized superconductor LaFeAsO0.85 (Tc=26 K), confirmed by measurements of electrical resistivity, magnetic susceptibility, specific heat, Mössbauer spectroscopy, Hall coefficient, and an electron probe microanalysis. The rate ∼9 K/% is remarkably higher than others achieved by nonmagnetic impurities. The Tc suppression is likely due to pair breaking caused by scattering associated with the highly localized electronic state of Zn in the Fe2As2 layer. If this is true, the present result well accords with the theoretical prediction that suggests a sign reversal s-wave pairing model for the Fe-pnictide superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAsO0.85 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure unresolved | onset |
| LaFeAsO0.85 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure unresolved | onset |
| LaFe1-xZnxAsO0.85 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure unresolved | onset |
Similar papers
Large decrease in the critical temperature of superconducting LaFeAsO0.85 compounds doped with 3% atomic weight of nonmagnetic Zn impurities
similarity 0.94Y. F. Guo et al. · 2010 · arXiv:1006.2874
Source status unknown — claims are unverified
Correlated pressure effects on the structure and superconductivity of LaFeAsO0.9F0.1
similarity 0.94G. Garbarino et al.
Source status unknown — claims are unverified
Drastic suppression of the superconductivity of LaFeAsO0.85 by a nonmagnetic impurity
similarity 0.93Y. F. Guo et al. · 2009 · arXiv:0911.2975
Source status unknown — claims are unverified
Electronic correlations in the superconductor LaFeAsO0.89F0.11 with low carrier density
similarity 0.93Athena S. Sefat et al.
Source status unknown — claims are unverified
Superconductivity in the Mn5Si3-type Zr5Sb3 system
similarity 0.93B. Lv et al.
Source status unknown — claims are unverified
Effect of chemical pressure on spin density wave and superconductivity in undoped and 15% F-doped La1−yYyFeAsO compounds
similarity 0.93M. Tropeano et al.
Source status unknown — claims are unverified