Resistivity saturation in PrFeAsO1-xFy superconductor: evidence of strong electron-phonon coupling

被引：24
作者：
Bhoi, D. [1 ]
Mandal, P. [1 ]
Choudhury, P. [2 ]
机构：
[1] Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India
[2] Cent Glass & Ceram Res Inst, Kolkata 700032, W Bengal, India
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2008年 / 21卷 / 12期
关键词：
D O I：
10.1088/0953-2048/21/12/125021
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have measured the resistivity of PrFeAsO1-xFy samples over a wide range of temperature in order to elucidate the role of electron-phonon interaction on normal- and superconducting-state properties. The linear T dependence of. above 170 K followed by a saturation-like behavior at higher temperature is a clear signature of strong electron-phonon coupling. From the analysis of the T dependence of., we have estimated several normal- state parameters that are useful for understanding the origin of superconductivity in this system. Our results suggest that Fe-based oxypnictides are phonon-mediated BCS superconductors like Chevrel phases and A15 compounds.
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