Real-space calculation of thermal Hall effects in strained and disordered kagome ferromagnets

IF 3.1 3区 物理与天体物理 Q2 PHYSICS, APPLIED Journal of Physics D: Applied Physics Pub Date : 2024-07-17 DOI:10.1088/1361-6463/ad60da
Ning Zhang and Hengyi Xu
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Abstract

Ferromagnetic insulators may exhibit magnon Hall effects when subjected to a temperature gradient due to the Dzyaloshinsky–Moriya interaction. In this study, we investigate the magnon thermal Hall conductivity of kagome ferromagnets in real space using the kernel polynomial method. We first establish the formalism in real space within the framework of linear response theory, which enables efficient numerical calculations of thermal transport properties under various imperfections. The validity and accuracy of the real-space approach are confirmed by comparing the calculations with those obtained in momentum space. This approach is particularly advantageous for computing the thermal transport coefficients of disordered lattices. We consider two types of disorder in kagome ferromagnets and observe that both types significantly influence across the entire temperature range. This is in contrast to the effects of strains, where strains primarily impact the maximum values of .
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应变和无序卡戈梅铁磁体热霍尔效应的实空间计算
由于 Dzyaloshinsky-Moriya 相互作用,铁磁绝缘体在受到温度梯度影响时可能会表现出磁子霍尔效应。在本研究中,我们使用核多项式方法研究了卡戈梅铁磁体在实空间的磁子热霍尔电导率。我们首先在线性响应理论框架内建立了实空间形式主义,从而能够在各种不完善条件下对热传输特性进行高效的数值计算。通过将计算结果与在动量空间中获得的结果进行比较,证实了实空间方法的有效性和准确性。这种方法对于计算无序晶格的热传输系数尤其有利。我们考虑了卡戈梅铁磁体中的两种无序类型,并观察到这两种类型对整个温度范围都有显著影响。这与应变的影响形成鲜明对比,应变主要影响 .
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来源期刊
Journal of Physics D: Applied Physics
Journal of Physics D: Applied Physics 物理-物理:应用
CiteScore
6.80
自引率
8.80%
发文量
835
审稿时长
2.1 months
期刊介绍: This journal is concerned with all aspects of applied physics research, from biophysics, magnetism, plasmas and semiconductors to the structure and properties of matter.
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