Spin-Wave Analysis of the Spin-1 Two-Dimensional Frustrated Heisenberg Antiferromagnet with the Single-Ion Anisotropy

被引：2
|
作者：
Wu You [1 ]
Chen Yuan [1 ]
机构：
[1] Guangzhou Univ, Dept Phys, Coll Phys & Elect Engn, Guangzhou 510006, Guangdong, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2013年 / 60卷 / 03期
关键词：
Heisenberg antiferromagnet; spin-wave theory; frustration; single-ion anisotropy; SQUARE-LATTICE; EXACT DIAGONALIZATION; FINITE-TEMPERATURE; EXPANSION; SYSTEMS; MODEL;
D O I：
10.1088/0253-6102/60/3/17
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, the low-temperature properties of the spin-1 two-dimensional frustrated Heisenberg antiferromagnet with the single-ion anisotropy are investigated on a square lattice by using the spin-wave theory. The influence of the frustration and anisotropy is found in the thermodynamics of the model, such as the temperature dependence of the staggered magnetization and specific heat. For some selected values of the frustration and anisotropy parameters, the results for the specific heat are compared with those of existing theories and numerical estimates. Within a spin-wave analysis, we have found the evidence for an intermediate magnetically disorder phase to separate the Neel and collinear phases.
引用
收藏
页码：357 / 362
页数：6
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