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arXiv 1003.2528cond-mat.supr-con
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NdFe1-xRhxAsO的电子phase diagram

Electronic phase diagram of NdFe1-xRhxAsO

David Berardan, Lidong Zhao, Loreynne Pinsard-Gaudart, Nita Dragoe

摘要:

本文报道了掺铑NdFeAsO的电阻率、热电势和电子相图。铑掺杂抑制了未掺杂材料中观察到的结构相变和自旋密度波,并且在x接近0.05时出现超导性,尽管由Rh和Fe元素之间的大尺寸差异引起的FeAs 4四面体的畸变。Tc(x)曲线呈圆顶状,在x = 0.1时达到最高值,Tconset = 18K。观察到高于Tc的电阻率上升,高于Tc时具有近藤状行为,而接近室温时具有费米液体行为。

英文摘要:

We report on the electrical resistivity, thermoelectric power and electronic phase diagram of rhodium-doped NdFeAsO. Rhodium doping suppresses the structural phase transition and spin density wave observed in the undoped material, and superconductivity emerges at x close to 0.05, despite the distortion of FeAs4 tetrahedra induced by the large size difference between Rh and Fe elements. The Tc(x) curve is dome-like, and the highest Tc is reached at x = 0.1, with Tconset = 18K. An upturn of the electrical resistivity above Tc has been observed, with a Kondo like behaviour above Tc and a Fermi-liquid behaviour close to room temperature.

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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