Superconductivity in the two-band Hubbard model

被引：25
|
作者：
Koga, Akihisa [1 ]
Werner, Philipp [2 ]
机构：
[1] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan
[2] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland
来源：
PHYSICAL REVIEW B | 2015年 / 91卷 / 08期
关键词：
MEAN-FIELD THEORY; INFINITE DIMENSIONS; ORBITAL DEGENERACY; INSULATOR-TRANSITION; SYSTEMS; METAL; FERROMAGNETISM; FERMIONS; LATTICE; STATE;
D O I：
10.1103/PhysRevB.91.085108
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the two-band Hubbard model in infinite dimensions by solving the dynamical mean-field equations with a strong coupling continuous-time quantum Monte Carlo method and show that an s-wave superconducting state can be stabilized in the repulsively interacting case. We discuss how this superconducting state competes with the metallic and paired Mott states. The effects of the Hund coupling and crystalline electric field are also addressed.
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页数：7
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