Normal-state transport properties of PrFeAsO$_{1-x}$F$_y$ superconductor

D. Bhoi; P. Mandal; P. Choudhury

doi:10.1016/j.physc.2008.07.006

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arXiv · 0807.3833

Normal-state transport properties of PrFeAsO$_{1-x}$F$_y$ superconductor

D. Bhoi·P. Mandal·P. Choudhury

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Abstract

We have synthesized oxygen-deficient fluorine-doped samples of nominal composition PrFeAsO$_{1-x}$F$_y$ to study the normal and superconducting state properties. Resistivity of undoped PrFeAsO exhibits a strong anomaly at around 155 K due to the spin-density-wave instability. Fluorine doping ($x$=0.4, $y$=0.12) suppresses this magnetic instability and drives the system to the superconducting ground state with superconducting onset temperature 50 K. The behavior of normal-state resistivity changes from $T^2$-like to $T$-linear to sublinear in $T$ with increasing temperature indicating that both electron-electron interaction and electron-phonon interaction are strong. From the analysis of $T$ dependence of $ρ$, we have estimated the electron-phonon coupling strength ($λ$) to be quite large (1.3).

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D. Bhoi, P. Mandal, P. Choudhury. 2008-07-24. Normal-state transport properties of PrFeAsO$_{1-x}$F$_y$ superconductor. https://doi.org/10.1016/j.physc.2008.07.006

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