Spontaneously Symmetry-Breaking States in the Attractive SU(N) Hubbard Model

被引：10

作者：

Koga, Akihisa ^{[1
]}

Yanatori, Hiromasa ^{[1
]}

机构：

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

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2017年 / 86卷 / 03期

关键词：

MEAN-FIELD THEORY; SUPERCONDUCTIVITY; FERMIONS;

D O I：

10.7566/JPSJ.86.034702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate spontaneously symmetry-breaking states in the attractive SU(N) Hubbard model at half filling. Combining dynamical mean-field theory with the continuous-time quantum Monte Carlo method, we obtain finite-temperature phase diagrams for the superfluid state. When N > 2, a second-order phase transition occurs in the weak coupling region, while a first-order phase transition with hysteresis appears in the strong coupling region. We also discuss the stability of the density wave state and clarify the component dependence of the maximum critical temperature.

引用

页数：7

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