Metal-insulator phase diagram and orbital selectivity in three-orbital models with rotationally invariant Hund coupling

被引：88

作者：

Werner, Philipp ^{[1
]}

Gull, Emanuel ^{[1
]}

Millis, Andrew J. ^{[2
]}

机构：

[1] Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland

[2] Columbia Univ, Dept Phys, New York, NY 10027 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 11期

基金：

瑞士国家科学基金会;

关键词：

chemical potential; metal-insulator transition; perturbation theory; phase diagrams; INFINITE DIMENSIONS; MONTE-CARLO; SUPERCONDUCTIVITY; TRANSITION; SYSTEMS; OXIDES;

D O I：

10.1103/PhysRevB.79.115119

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A three-band model containing the essential physics of transition-metal oxides with partially filled t(2g) shells is solved in the single-site dynamical mean-field approximation, using the full rotationally invariant Slater-Kanamori interactions. We compute the metal-Mott insulator phase diagram in the space of chemical potential and interaction strength, determine the response of the different phases to perturbations which break the orbital symmetry, and establish the regimes in which an orbital selective Mott phase occurs. The results are compared to data on titanates, ruthenates, vanadates, and C-60.

引用

页数：9

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