Electronic structure, magnetism and superconductivity of layered iron compounds

被引：14

作者：

Singh, D. J. ^{[1
]}

Du, M. -H. ^{[1
]}

Zhang, L. ^{[1
]}

Subedi, A. ^{[1
,2
]}

An, J. ^{[1
,3
]}

机构：

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[3] Wuhan Univ Technol, Wuhan 430070, Peoples R China

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2009年 / 469卷 / 15-20期

关键词：

Band structure; Fermi surface; Magnetism; Superconductivity; PHASE; ORDER;

D O I：

10.1016/j.physc.2009.05.091

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The layered iron superconductors are discussed using electronic structure calculations. The four families of compounds discovered so far, including Fe (Se, Te) have closely related electronic structures. The Fermi surface consists of disconnected hole and electron cylinders and additional hole sections that depend on the specific material. This places the materials in proximity to itinerant magnetism, both due to the high density of states and due to nesting. Comparison of density functional results and experiment provides strong evidence for itinerant spin fluctuations, which are discussed in relation to Superconductivity. It is proposed that the intermediate phase between the structural transition and the SDW transition in the oxy-pnictides is a nematic phase. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：886 / 889

页数：4

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