Magnetic properties of the spin-1 J1 - J3 Heisenberg model on a triangular lattice

被引：0

作者：

Nguyen Van Hinh ^{[1
]}

Pham Thi Thanh Nga ^{[2
]}

机构：

[1] Hanoi Univ Ind, 298 Cau Dien, Hanoi, Vietnam

[2] Thuyloi Univ, Fac Elect & Elect Engn, 175 Tay Son, Hanoi, Vietnam

来源：

48TH VIETNAM CONFERENCE ON THEORETICAL PHYSICS, VCTP-48 | 2024年 / 2744卷

关键词：

D O I：

10.1088/1742-6596/2744/1/012003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the spin-1 J(1) - J(3) Heisenberg model with antiferromagnetic nearest neighbors J(1) > 0 and the ferromagnetic third nearest neighbor J(3) < 0 for a triangular lattice. The ground-state and thermodynamic properties are evaluated under the Popov-Fedotov functional integral method and the Luttinger-Tisza procedure. Perturbation expansion of the auxiliary field around mean-field theory was carried out to investigate the effect of thermal fluctuations on ground state energy and sublattice magnetization. The results are compared with those of the spin wave approximation and other methods.

引用

页数：9

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