Symmetry Breaking States in the Half-Filled Two-Orbital Hubbard Model with Crystalline Electric Field

被引：1

作者：

Ishigaki, Kosuke ^{[1
]}

Nasu, Joji ^{[1
]}

Koga, Akihisa ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2019年 / 88卷 / 02期

关键词：

SUPERCONDUCTIVITY; TRANSITION; FERROMAGNETISM;

D O I：

10.7566/JPSJ.88.024702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the half-filled two-orbital Hubbard model with the crystalline electric field using dynamical mean-field theory combined with the continuous-time quantum Monte Carlo simulations. We systematically study how the interplay of the intra- and interorbital Coulomb interations together with the Hund coupling realizes the diagonal and off-diagonal ordered states. It is found that the antiferroorbital ordered state is realized in the Hubbard model, in addition to the antiferromagnetically ordered and excitonic states. The competition between the antiferroorbital ordered and excitonic states close to the band insulating state is addressed.

引用

页数：5

共 61 条

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