Pressure Effect on Superconductivity of Iron-based Arsenic-oxide ReFeAsO0.85 (Re=Sm and Nd)

Abstract

Here we report pressure effect on superconducting transition temperature (Tc) of ReFeAsO0.85 (Re= Sm and Nd) system without fluorine doping. In-situ measurements under high pressure showed that Tc of the two compounds decrease monotonously over the pressure range investigated. The pressure coefficients dTc/dP in SmFeAsO0.85 and Nd FeAsO0.85 were different, revealing the important influence of the deformation in layers on Tc. Theoretical calculations suggested that the electron density of states decrease with increasing pressure, following the same trend of experimental data.

13 pages and 4 figures

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Cited by in corpus (8)

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• Pressure evolution of low-temperature crystal structure and bonding of 37 K $T_c$ FeSe superconductor
• High Pressure Studies on Fe-Pnictide Superconductors
• Superconductivity at 31 K in 111 type iron arsenide superconductor NaxFeAs induced by pressure
• High pressure study on LaFeAsO with different Tc
• Evidence for Competition between Superconductivity and Kondo Effect in CeFeAsO0.7F0.3 under High Pressure
• Superconductivity under pressure in $R$FeAsO${}_{1-\mathrm{x}}$F${}_{\mathrm{x}}$ ($R$=La, Ce$-$Sm) by dc magnetization measurements
• Correlation between non-centrosymmetry and superconductivity in quasi-one-dimensional compounds A2Cr3As3 (A=K, Rb)