Density functional study of LaFeAsO1-xFx:: A low carrier density superconductor near itinerant magnetism

被引：1005

作者：

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

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

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.100.237003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Density functional studies of 26 K superconducting LaFeAs(O,F) are reported. We find a low carrier density, high density of states, N(E(F)), and modest phonon frequencies relative to T(c). The high N(E(F)) leads to proximity to itinerant magnetism, with competing ferromagnetic and antiferromagnetic fluctuations and the balance between these controlled by the doping level. Thus LaFeAs(O,F) is in a unique class of high T(c) superconductors: high N(E(F)) ionic metals near magnetism.

引用

页数：4

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