Spin-wave energy dispersion of a frustrated spin-1/2 Heisenberg antiferromagnet on a stacked square lattice

被引:10
|
作者
Majumdar, Kingshuk [1 ]
机构
[1] Grand Valley State Univ, Dept Phys, Allendale, MI 49401 USA
基金
美国国家科学基金会;
关键词
SUPERCONDUCTIVITY;
D O I
10.1088/0953-8984/23/11/116004
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The effects of interlayer coupling and spatial anisotropy on the spin-wave excitation spectra of a three-dimensional spatially anisotropic, frustrated spin-1/2 Heisenberg antiferromagnet (HAFM) are investigated for the two ordered phases using second-order spin-wave expansion. We show that the second-order corrections to the spin-wave energies are significant and find that the energy spectra of the three-dimensional HAFM have similar qualitative features to the energy spectra of the two-dimensional HAFM on a square lattice. We also discuss the features that can provide experimental measures for the strength of the interlayer coupling, spatial anisotropy parameter, and magnetic frustration.
引用
收藏
页数:6
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