The electronic structure of rare-earth iron silicide R2Fe3Si5 superconductors

被引：4

作者：

Winiarski, M. J. ^{[1
]}

Samsel-Czekala, M. ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland

来源：

SOLID STATE SCIENCES | 2013年 / 26卷

关键词：

Superconductors; Electronic structure; Fermi surface; TEMPERATURE HEAT-CAPACITY; NEUTRON-DIFFRACTION; CRITICAL-FIELD; TRANSITION; LU2FE3SI5; MAGNETISM;

D O I：

10.1016/j.solidstatesciences.2013.10.006

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The electronic structures of R2Fe3Si5 (where R = Lu, Tm, Er, Tb, Yb) intermetallics have been calculated from first principles in local-spin density (LSDA) and LSDA + U approaches. The majority of rare-earth iron suicides, except for the heavy-fermion Yb-based compound, exhibit almost equal values of density of states at the Fermi level (E-F) as well as very similar Fermi surface topology. The electronic structure around E-F in the 235-type Fe-based compounds is completely dominated by the Fe 3d states. Thus the different superconducting properties of some members of the R2Fe3Si5 family are rather related to a presence of local magnetic moments of R-atoms than to electronic-structure features at E-F. (C) 2013 Elsevier Masson SAS. All rights reserved.

引用

页码：134 / 138

页数：5

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