Multiband magnetism and superconductivity in Fe-based compounds

被引：321

作者：

Cvetkovic, V. ^{[1
]}

Tesanovic, Z. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

EPL | 2009年 / 85卷 / 03期

关键词：

LAYERED QUATERNARY COMPOUND; TRANSITION; STATE;

D O I：

10.1209/0295-5075/85/37002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent discovery of superconductivity in Fe-based layered compounds may have opened a new pathway to the room temperature superconductivity. A model Hamiltonian describing FeAs layers is introduced, highlighting the crucial role of puckering of As atoms in promoting d electron itinerancy and warding off large local-moment magnetism of Fe ions, the main enemy of superconductivity. Quantum many-particle effects in charge, spin and multiband channels are explored and a nesting-induced spin density-wave order is found in the parent compund. We argue that this largely itinerant antiferromagnetism and high T-c itself are essentially tied to the multiband nature of the Fermi surface. Copyright (C) EPLA, 2009

引用

页数：6

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