Unification of the pressure and composition dependence of superconductivity in Ru substituted BaFe2As2

T. R. Devidas; Awadhesh Mani; Shilpam Sharma; K. Vinod; A. Bharathi; C. S. Sundar

doi:10.1016/j.ssc.2014.02.002

Unification of the pressure and composition dependence of superconductivity in Ru substituted BaFe₂As₂

T. R. Devidas
, Awadhesh Mani
, Shilpam Sharma
, K. Vinod
, A. Bharathi
, C. S. Sundar

Indira Gandhi Centre for Atomic Research

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Temperature dependent high pressure electrical resistivity studies have been carried out on Ba(Fe_1-x Ru_x)₂As ₂ single crystals with x=0.12, 0.26 and 0.35, which correspond to under-doped, optimally doped and over-doped composition regimes, respectively. The evolution of structural/magnetic (T_S-M) and superconducting transition (T_c) temperatures, with pressure for various compositions has been obtained. The normal state resistivity has been analyzed in terms of a model that incorporates both spin fluctuations and the opening of the gap in the spin density wave (SDW) phase. It is shown that T_c scales with the strength of the spin fluctuation, B, and T_S-M scales with the SDW gap parameter, Δ. This provides a prescription for the unification of the composition and pressure induced superconductivity in BaFe₂As ₂.

Original language	English
Pages (from-to)	62-66
Number of pages	5
Journal	Solid State Communications
Volume	185
DOIs	https://doi.org/10.1016/j.ssc.2014.02.002
State	Published - May 2014
Externally published	Yes

Keywords

A. Iron Arsenide-based superconductors
B. Single crystals
D. Phase transition
E. High pressure

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10.1016/j.ssc.2014.02.002

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title = "Unification of the pressure and composition dependence of superconductivity in Ru substituted BaFe2As2",

abstract = "Temperature dependent high pressure electrical resistivity studies have been carried out on Ba(Fe1-x Rux)2As 2 single crystals with x=0.12, 0.26 and 0.35, which correspond to under-doped, optimally doped and over-doped composition regimes, respectively. The evolution of structural/magnetic (TS-M) and superconducting transition (Tc) temperatures, with pressure for various compositions has been obtained. The normal state resistivity has been analyzed in terms of a model that incorporates both spin fluctuations and the opening of the gap in the spin density wave (SDW) phase. It is shown that Tc scales with the strength of the spin fluctuation, B, and TS-M scales with the SDW gap parameter, Δ. This provides a prescription for the unification of the composition and pressure induced superconductivity in BaFe2As 2.",

keywords = "A. Iron Arsenide-based superconductors, B. Single crystals, D. Phase transition, E. High pressure",

author = "Devidas, \{T. R.\} and Awadhesh Mani and Shilpam Sharma and K. Vinod and A. Bharathi and Sundar, \{C. S.\}",

year = "2014",

month = may,

doi = "10.1016/j.ssc.2014.02.002",

language = "אנגלית",

volume = "185",

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journal = "Solid State Communications",

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TY - JOUR

T1 - Unification of the pressure and composition dependence of superconductivity in Ru substituted BaFe2As2

AU - Devidas, T. R.

AU - Mani, Awadhesh

AU - Sharma, Shilpam

AU - Vinod, K.

AU - Bharathi, A.

AU - Sundar, C. S.

PY - 2014/5

Y1 - 2014/5

N2 - Temperature dependent high pressure electrical resistivity studies have been carried out on Ba(Fe1-x Rux)2As 2 single crystals with x=0.12, 0.26 and 0.35, which correspond to under-doped, optimally doped and over-doped composition regimes, respectively. The evolution of structural/magnetic (TS-M) and superconducting transition (Tc) temperatures, with pressure for various compositions has been obtained. The normal state resistivity has been analyzed in terms of a model that incorporates both spin fluctuations and the opening of the gap in the spin density wave (SDW) phase. It is shown that Tc scales with the strength of the spin fluctuation, B, and TS-M scales with the SDW gap parameter, Δ. This provides a prescription for the unification of the composition and pressure induced superconductivity in BaFe2As 2.

AB - Temperature dependent high pressure electrical resistivity studies have been carried out on Ba(Fe1-x Rux)2As 2 single crystals with x=0.12, 0.26 and 0.35, which correspond to under-doped, optimally doped and over-doped composition regimes, respectively. The evolution of structural/magnetic (TS-M) and superconducting transition (Tc) temperatures, with pressure for various compositions has been obtained. The normal state resistivity has been analyzed in terms of a model that incorporates both spin fluctuations and the opening of the gap in the spin density wave (SDW) phase. It is shown that Tc scales with the strength of the spin fluctuation, B, and TS-M scales with the SDW gap parameter, Δ. This provides a prescription for the unification of the composition and pressure induced superconductivity in BaFe2As 2.

KW - A. Iron Arsenide-based superconductors

KW - B. Single crystals

KW - D. Phase transition

KW - E. High pressure

UR - https://www.scopus.com/pages/publications/84894614153

U2 - 10.1016/j.ssc.2014.02.002

DO - 10.1016/j.ssc.2014.02.002

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AN - SCOPUS:84894614153

SN - 0038-1098

VL - 185

SP - 62

EP - 66

JO - Solid State Communications

JF - Solid State Communications

ER -

Unification of the pressure and composition dependence of superconductivity in Ru substituted BaFe₂As₂

Abstract

Keywords

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