Magneto-orbital coupling in iron pnictides

被引：1
|
作者：
Ghosh, Sayandip [1 ]
Raghuvanshi, Nimisha [1 ]
Singh, Avinash [1 ]
机构：
[1] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2016年 / 405卷
关键词：
Iron pnictides; Multi-orbital model; SDW state; SUPERCONDUCTIVITY; ANISOTROPY; PHASE; ORDER;
D O I：
10.1016/j.jmmm.2016.01.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A magneto-orbital coupling mechanism is proposed to account for the weak energy gap at the Fermi energy in the (pi, 0) ordered SDW state of a realistic three-orbital model for iron pnictides involving d(xz), d(yz), and d(xy) Fe orbitals. The orbital mixing terms between the d(xy) and d(xz)/d(yz) orbitals, which are important in reproducing the orbital composition of the elliptical electron pockets at (+/- pi, 0) and (0, +/- pi), are shown to play a key role in the energy gap formation in the SDW state. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：264 / 269
页数：6
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