Coherence-Incoherence Crossover and the Mass-Renormalization Puzzles in Sr2RuO4

被引：223

作者：

Mravlje, Jernej ^{[1
,2
]}

Aichhorn, Markus ^{[1
,3
]}

Miyake, Takashi ^{[4
,5
]}

Haule, Kristjan ^{[6
,7
]}

Kotliar, Gabriel ^{[6
,7
]}

Georges, Antoine ^{[1
,5
,8
]}

机构：

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

[2] Jozef Stefan Inst, Ljubljana, Slovenia

[3] Graz Univ Technol, Inst Theoret & Computat Phys, Graz, Austria

[4] AIST, Nanosyst Res Inst, Tsukuba, Ibaraki 3058568, Japan

[5] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

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

[7] Rutgers State Univ, Ctr Mat Theory, Piscataway, NJ 08854 USA

[8] Coll France, F-75005 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 09期

基金：

奥地利科学基金会; 美国国家科学基金会;

关键词：

INSULATOR-TRANSITION; STATE;

D O I：

10.1103/PhysRevLett.106.096401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate the electronic structure of Sr2RuO4, treating correlations within dynamical mean-field theory. The approach successfully reproduces several experimental results and explains the key properties of this material: the anisotropic mass renormalization of quasiparticles and the crossover into an incoherent regime above a low temperature scale. While the orbital differentiation originates from the proximity of the van Hove singularity, strong correlations are caused by the Hund's coupling. The generality of this mechanism for other correlated materials is pointed out.

引用

页数：4

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