Phase diagram of the two-dimensional periodic Anderson model at half-filling

被引：0

作者：

Sun, Shih-Jye ^{[1
]}

Hong, Tzay-Ming ^{[1
]}

Yang, Min Fong ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Hsinchu, Taiwan

来源：

Physica B: Condensed Matter | 1995年 / 216卷 / 1-2期

关键词：

Antiferromagnetism - Approximation theory - Electrons - Magnetic properties - Mathematical models - Monte Carlo methods - Paramagnetism - Quantum theory;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We use the Kotliar and Ruckenstein slave-boson mean-field representation for the periodic Anderson model and the Hartree-Fock approximation for the Kondo lattice model to determine the phase boundary between antiferromagnetic and paramagnetic states. A comparison is made with the quantum Monte Carlo and spin-density-wave mean-field results. We find that at the mean-field level the Kotliar and Ruckenstein slave-boson formalism is better than the spin-density-wave approach, but both deviate from the quantum Monte Carlo result at large hybridization V, where the Hartree-Fock approximation for the Kondo lattice gives a better description.

引用

页码：111 / 115