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

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

Racah Institute of Physics

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60 Scopus citations

Abstract

We observed a large decrease in T_c by no more than 3 at.% of Zn doped into the T_c -optimized superconductor LaFeAsO_0.85 (T_c =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 T _c suppression is likely due to pair breaking caused by scattering associated with the highly localized electronic state of Zn in the Fe ₂As₂ 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.

Original language	English
Article number	054506
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	82
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.82.054506
State	Published - 5 Aug 2010

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Guo, Y. F., Shi, Y. G., Yu, S., Belik, A. A., Matsushita, Y., Tanaka, M., Katsuya, Y., Kobayashi, K., Nowik, I., Felner, I., Awana, V. P. S., Yamaura, K., & Takayama-Muromachi, E. (2010). Large decrease in the critical temperature of superconducting LaFeAsO0.85 compounds doped with 3% atomic weight of nonmagnetic Zn impurities. Physical Review B - Condensed Matter and Materials Physics, 82(5), Article 054506. https://doi.org/10.1103/PhysRevB.82.054506

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title = "Large decrease in the critical temperature of superconducting LaFeAsO0.85 compounds doped with 3% atomic weight of nonmagnetic Zn impurities",

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, M{\"o}ssbauer spectroscopy, Hall coefficient, and an electron probe microanalysis. The rate ∼9 K/% is remarkably higher than others achieved by nonmagnetic impurities. The T c suppression is likely due to pair breaking caused by scattering associated with the highly localized electronic state of Zn in the Fe 2As2 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.",

author = "Guo, {Y. F.} and Shi, {Y. G.} and S. Yu and Belik, {A. A.} and Y. Matsushita and M. Tanaka and Y. Katsuya and K. Kobayashi and I. Nowik and I. Felner and Awana, {V. P.S.} and K. Yamaura and E. Takayama-Muromachi",

year = "2010",

month = aug,

day = "5",

doi = "10.1103/PhysRevB.82.054506",

language = "אנגלית",

volume = "82",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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publisher = "American Physical Society",

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Guo, YF, Shi, YG, Yu, S, Belik, AA, Matsushita, Y, Tanaka, M, Katsuya, Y, Kobayashi, K, Nowik, I, Felner, I, Awana, VPS, Yamaura, K & Takayama-Muromachi, E 2010, 'Large decrease in the critical temperature of superconducting LaFeAsO0.85 compounds doped with 3% atomic weight of nonmagnetic Zn impurities', Physical Review B - Condensed Matter and Materials Physics, vol. 82, no. 5, 054506. https://doi.org/10.1103/PhysRevB.82.054506

TY - JOUR

T1 - Large decrease in the critical temperature of superconducting LaFeAsO0.85 compounds doped with 3% atomic weight of nonmagnetic Zn impurities

AU - Guo, Y. F.

AU - Shi, Y. G.

AU - Yu, S.

AU - Belik, A. A.

AU - Matsushita, Y.

AU - Tanaka, M.

AU - Katsuya, Y.

AU - Kobayashi, K.

AU - Nowik, I.

AU - Felner, I.

AU - Awana, V. P.S.

AU - Yamaura, K.

AU - Takayama-Muromachi, E.

PY - 2010/8/5

Y1 - 2010/8/5

N2 - 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 T c suppression is likely due to pair breaking caused by scattering associated with the highly localized electronic state of Zn in the Fe 2As2 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.

AB - 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 T c suppression is likely due to pair breaking caused by scattering associated with the highly localized electronic state of Zn in the Fe 2As2 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.

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SN - 1098-0121

VL - 82

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 5

M1 - 054506

ER -

Large decrease in the critical temperature of superconducting LaFeAsO0.85 compounds doped with 3% atomic weight of nonmagnetic Zn impurities

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