Itinerant antiferromagnetism in infinite dimensional Kondo lattice

被引：23

作者：

Hoshino, Shintaro ^{[1
]}

Otsuki, Junya ^{[1
]}

Kuramoto, Yoshio ^{[1
]}

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.81.113108

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly accurate numerical results for single-particle spectrum and order parameter are obtained for the magnetically ordered Kondo lattice by means of the dynamical mean-field theory combined with the continuous-time quantum Monte Carlo method. Hybridized energy bands involving local spins are identified in the Neacuteel state as a hallmark of itinerant antiferromagnetism. At the boundary of the reduced Brillouin zone, the twofold degeneracy remains in spite of the doubled unit cell. This degeneracy results if the molecular field felt by localized spins has identical magnitude and reversed direction with that of conduction electrons. The persistent Kondo effect is responsible for the behavior. The antiferromagnetic quantum transition occurs inside the itinerant regime and does not accompany the itinerant-localized transition.

引用

页数：4

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