The band structure and Fermi surface of (Sr3Sc2O5) Fe2As2

被引：2

作者：

Wang, Guangtao ^{[1
]}

Liang, Yongcheng ^{[2
]}

Zheng, Lihua ^{[1
]}

Yang, Zongxian ^{[1
]}

机构：

[1] Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Henan, Peoples R China

[2] Shanghai Ocean Univ, Coll Engn Sci & Technol, Shanghai 200090, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 41期

关键词：

LAYERED QUATERNARY COMPOUND; SUPERCONDUCTIVITY; INSTABILITY; FEAS;

D O I：

10.1088/0953-8984/21/41/415702

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Inspired by the experience in CuO-based superconductor that a larger spacing distance between CuO planes induced a higher T-C, some researchers synthesized (Sr3Sc2O5)Fe2As2 and related compounds with spacing distances between FeAs planes as large as 15 angstrom and expected a higher TC. Our density functional calculations indicate that the Fermi surface of (Sr3Sc2O5) Fe2As2 is very similar to that of LaOFeAs, while the projected band structure shows some differences. From Fermi surface nesting and the calculated Lindhard response function chi(q), we predict that a spin density wave (SDW) and stripe antiferromagnetism (AF) may exist in the undoped compound and that electron or hole doping will suppress this SDW state. Similar to LaFeAsO, both the stabilization energy and the moment are very sensitive to the As atom positions. Because of the considerable similarity to LaFeAsO, (Sr3Sc2O5) Fe2As2 is expected to become a superconductor with electron or hole doping.

引用

页数：5

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