Orbital Order and Hund's Rule Frustration in Kondo Lattices

被引：3
|
作者：
Isaev, L. [1 ]
Aoyama, K. [1 ,2 ,3 ]
Paul, I. [4 ,5 ]
Vekhter, I. [1 ]
机构：
[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[2] Kyoto Univ, Hakubi Ctr Adv Res, Kyoto 6068501, Japan
[3] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
[4] Univ Paris 07, Lab Mat & Phenomenes Quant, F-75205 Paris, France
[5] CNRS, UMR 7162, F-75205 Paris, France
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 15期
基金：
美国国家科学基金会;
关键词：
CONDUCTION; ELECTRON; ANDERSON; MODEL;
D O I：
10.1103/PhysRevLett.111.157202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We analyze a microscopic origin of the Kondo effect-assisted orbital order in heavy-fermion materials. By studying the periodic two-orbital Anderson model with two local electrons, we show that frustration of Hund's rule coupling due to the Kondo effect leads to an incommensurate spiral orbital and magnetic order, which exists only inside the Kondo screened (heavy-electron) phase. This spiral state can be observed in neutron and resonant x-ray scattering measurements in U- and Pr-based heavy-fermion compounds, and realized in cold atomic gases, e.g., fermionic Yb-173.
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页数：5
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