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Condensed Matter > Superconductivity

arXiv:1004.1978 (cond-mat)
[Submitted on 12 Apr 2010]

Title:Isoelectronic Ru substitution at Fe-site in Sm(Fe1-xRux)As(O0.85F0.15) compound and its effects on structural, superconducting and normal state properties

Authors:M. Tropeano, M.R.Cimberle, C. Ferdeghini, G. Lamura, A. Martinelli, A. Palenzona, I. Pallecchi, A. Sala, M. Putti, F.Bernardini, M. Monni, S.Massidda, I. Sheikin
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Abstract:In this work we present a systematic experimental and theoretical study of the structural, transport and superconducting properties of Sm(Fe1-xRux)As(O0.85F0.15) polycrystalline samples as a function of Ru content (x) ranging from 0 to 1. The choice of Ru as isoelectronic substitution at Fe site of F-doped compounds allows to better clarify the role of structural disorder in modifying the normal and superconducting properties of these newly discovered multiband superconductors. Two different regions are identified: the Fe-rich phase (x<0.5) where superconducting and normal state properties are strongly affected by disorder induced by Ru substitution; the Ru-rich phase (x>0.5) where the system is metallic and strongly compensated and the presence of Ru frustrates the magnetic moment on Fe ions. Here the lack of magnetic features and related spin fluctuations may be the cause for the suppression of superconductivity.
Comments: Accepted on Physical Review B
Subjects: Superconductivity (cond-mat.supr-con)
Cite as: arXiv:1004.1978 [cond-mat.supr-con]
  (or arXiv:1004.1978v1 [cond-mat.supr-con] for this version)
  https://doi.org/10.48550/arXiv.1004.1978
Journal reference: Physical Review B 81, 184504 (2010)
Related DOI: https://doi.org/10.1103/PhysRevB.81.184504

Submission history

From: Matteo Tropeano [view email]
[v1] Mon, 12 Apr 2010 14:47:32 UTC (459 KB)
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