Orbital contribution to the magnetic properties of nanowires:: is the orbital polarization ansatz justified?

被引：9

作者：

Desjonqueres, M. C.

Barreteau, C.

Autes, G.

Spanjaard, D.

机构：

[1] CEA Saclay, SPCSI, DRECAM, DSM, F-91191 Gif Sur Yvette, France

[2] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France

来源：

EUROPEAN PHYSICAL JOURNAL B | 2007年 / 55卷 / 01期

关键词：

D O I：

10.1140/epjb/e2007-00043-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We show that considerable orbital magnetic moments and magneto-crystalline anisotropy energies are obtained for a Fe monatomic wire described in a tight-binding method with intra-atomic electronic interactions treated in a full Hartree Fock (HF) decoupling scheme. Even though the use of the orbital polarization ansatz with simplified Hamiltonians leads to fairly good results when the spin magnetization is saturated this is not the case of unsaturated systems. We conclude that the full HF scheme is necessary to investigate low dimensional systems.

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页码：23 / 27

页数：5

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