T=0 Heavy-Fermion Quantum Critical Point as an Orbital-Selective Mott Transition

被引：50

作者：

De Leo, Lorenzo ^{[1
,2
]}

Civelli, Marcello ^{[3
]}

Kotliar, Gabriel ^{[2
]}

机构：

[1] Ecole Polytech, CNRS, Ctr Phys Theor, F-91128 Palaiseau, France

[2] Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA

[3] Inst Max Von Laue Paul Langevin, Theory Grp, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.101.256404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe the T=0 quantum phase transition in heavy-fermion systems as an orbital-selective Mott transition (OSMT) using a cluster extension of dynamical mean-field theory. This transition is characterized by the emergence of a new intermediate energy scale corresponding to the opening of a pseudogap and the vanishing of the low-energy hybridization between light and heavy electrons. We identify the fingerprint of Mott physics in heavy electron systems with the appearance of surfaces in momentum space where the self-energy diverges and we derive experimental consequences of this scenario for photoemission, compressibility, optical conductivity, susceptibility, and specific heat.

引用

页数：4

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