Heavy-fermion and spin-liquid behavior in a Kondo lattice with magnetic frustration

被引：117
作者：
Burdin, S [1 ]
Grempel, DR
Georges, A
机构：
[1] CEA, SPSMS, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France
[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
[3] CEA Saclay, SPCSI, F-91191 Gif Sur Yvette, France
[4] Ecole Normale Super, Phys Theor Lab, CNRS, F-75005 Paris, France
来源：
PHYSICAL REVIEW B | 2002年 / 66卷 / 04期
关键词：
D O I：
10.1103/PhysRevB.66.045111
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the competition between the Kondo effect and frustrating exchange interactions in a Kondo-lattice model within a large-N dynamical mean-field theory. We find a T=0 phase transition between a heavy Fermi liquid and a spin liquid for a critical value of the exchange J(c)=T-K(0), the single-impurity Kondo temperature. Close to the critical point, the Fermi-liquid coherence scale T-star is strongly reduced and the effective mass strongly enhanced. The regime T>T-star is characterized by spin-liquid magnetic correlations and non-Fermi-liquid properties. It is suggested that magnetic frustration is a general mechanism which is essential to explain the large effective mass of some metallic compounds such as LiV2O4.
引用
收藏
页码：451111 / 451116
页数：6
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