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arXiv 0808.2695cond-mat.supr-concond-mat.str-el
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PrFeAsO $_{1-x}$ F $_y$超导体的电阻率饱和:强电子-声子耦合的证据

Resistivity saturation in PrFeAsO$_{1-x}$F$_y$ superconductor: An evidence of strong electron-phonon coupling

D. Bhoi, P. Mandal, P. Choudhury

摘要:

我们测量了PrFeAsO $_{1-x}$ F $_y$样品在很宽的温度范围内的电阻率,以阐明电子-声子相互作用对正常和超导态性质的作用。$ρ$在170 K以上的线性T依赖性,随后在更高温度下的饱和行为是强电子-声子耦合的明显特征。通过对$ρ$的T依赖性的分析,我们估计了几个正常态参数,这些参数对理解该系统的超导电性起源是有用的。我们的研究结果表明,铁基氧磷属化合物是声子介导的BCS超导体,像Chevrel相和A15化合物。

英文摘要:

We have measured the resistivity of PrFeAsO$_{1-x}$F$_y$ 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 $ρ$ above 170 K followed by a saturationlike behavior at higher temperature is a clear signature of strong electron-phonon coupling. From the analysis of T dependence of $ρ$, we have estimated several normal-state parameters 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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