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arXiv 1701.07575cond-mat.supr-con
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Eu0- xSex的同步辐射粉末X射线衍射和结构分析

Synchrotron powder X-ray diffraction and structural analysis of Eu0.5La0.5FBiS2-xSex

K. Nagasaka, G. Jinno, O. Miura, A. Miura, C. Moriyoshi, Y. Kuroiwa, Y. Mizuguchi

摘要:

Eu0.5La0.5FBiS2-xSex是一种新的BiS 2基超导体系。在Eu0.5La0.5FBiS2-xSex中,通过La取代Eu将电子载流子掺杂到BiS 2层。在这个系统中的体超导电性是通过增加面内化学压力,这是由硒浓度(x)控制。在这项研究中,我们分析了Eu0.5La0.5FBiS2-xSex的晶体结构,使用同步辐射粉末衍射和Rietveld精修。结构参数和热因子的精确测定表明,Eu_(0.5)La_(0.5)FBiS_(2-x)Sex的体超导电性是通过面内化学压力的增强和面内无序度的降低而实现的。

英文摘要:

Eu0.5La0.5FBiS2-xSex is a new BiS2-based superconductor system. In Eu0.5La0.5FBiS2-xSex, electron carriers are doped to the BiS2 layer by the substitution of Eu by La. Bulk superconductivity in this system is induced by increasing the in-plane chemical pressure, which is controlled by the Se concentration (x). In this study, we have analysed the crystal structure of Eu0.5La0.5FBiS2-xSex using synchrotron powder diffraction and the Rietveld refinement. The precise determination of the structural parameters and thermal factors suggest that the emergence of bulk superconductivity in Eu0.5La0.5FBiS2-xSex is achieved by the enhanced in-plane chemical pressure and the decrease in in-plane disorder.

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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