Spin wave analysis of heisenberg magnets in restricted geometries
Spin wave analysis of heisenberg magnets in restricted geometries
复制标题
受限几何形状中海森堡磁体的自旋波分析
DOI：
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发表时间：
2004
期刊：
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通讯作者：
Diptiman Sen
中科院分区：
文献类型：
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作者：
N. B. Ivanov;Diptiman Sen
在过去的十年中，人们已经证明，标准的自旋波理论能够提供准确的零温度结果的一些低维海森堡自旋系统。在这一章中，我们介绍了自旋波技术的主要成分作为一个工作模型，两个腿的混合自旋亚铁磁阶梯和戴森Maleev玻色子形式主义的自旋波相互作用的第二阶。在其余部分中，我们调查典型的应用在低空间维度，以及最近的一些修改的理论承认在磁无序相的定量分析。所提出的自旋波的结果与现有的数值估计进行了比较。
In the last decade it has been proven that the standard spin-wave theory was able to provide accurate zero-temperature results for a number of lowdimensional Heisenberg spin systems. In this chapter we introduce the main ingredients of the spin-wave technique using as a working model the two-leg mixed-spin ferrimagnetic ladder and the Dyson Maleev boson formalism up to second order in the spin-wave interaction. In the remainder, we survey typical applications in lowspace dimensionality as well as some recent modifications of the theory admitting a quantitative analysis in magnetically disordered phases. The presented spin-wave results are compared with available numerical estimates.