Disorder-Sensitive Superconductivity and Bonding Network in the Iron-Silicide Superconductor Lu2Fe3Si5

被引：0

作者：

Okuyama, H. ^{[1
]}

Takase, K. ^{[1
]}

Takano, Y. ^{[1
]}

Watanabe, T. ^{[1
]}

Yoshida, F. ^{[2
]}

Moriyoshi, C. ^{[2
]}

Kuroiwa, Y. ^{[2
]}

机构：

[1] Nihon Univ, CST, Dept Phys, Chiyoda Ku, Tokyo 1018308, Japan

[2] Hiroshima Univ, Dept Phys Sci, Grad Sch Sci, Hiroshima 7398526, Japan

来源：

SOLID COMPOUNDS OF TRANSITION ELEMENTS | 2011年 / 170卷

关键词：

Iron-based compound; Superconductivity; Bonding nature; Substitution effect;

D O I：

10.4028/www.scientific.net/SSP.170.118

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We performed experimentally the electron-density mapping on the crystal structure of the iron-based superconductor Lu2Fe3Si5 which revealed the Fe-Si covalent-bonding network with the fully ionized Lu-sites. And, for Lu2Fe3Si5, we investigated the effect of Fe- and Si-site substitutions on the superconductivity. The Fe-site-substitution study revealed that, in addition to the disorder-sensitive superconductivity, the additionally-provided 3d electrons or holes tend to be itinerant rather than localized. Taking into account that the localized magnetic moments introduced on the Lu-sites are inactive as magnetic pair breakers, the present results suggest that, in Lu2Fe3Si5, the Fe-Si bonding network should be the playground for the exotic superconductivity which is characterized by the sign-reversed superconducting gap function.

引用

页码：118 / 121

页数：4

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