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arXiv 2006.12423cond-mat.mes-hallcond-mat.mtrl-sci
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反铁磁体中的磁振子朗道能级和自旋响应

Magnon Landau Levels and Spin Responses in Antiferromagnets

Bo Li, Alexey A. Kovalev

摘要:

我们研究了由Dzyaloshinskiii-Moriya相互作用梯度产生的规范场,提出了一个磁振子的AFM拓扑绝缘体模型。在长波长范围内,由非均匀Dzyaloshinskiii-Moriya相互作用诱导的朗道能级表现出Klein-Gordon方程描述的相对论物理。自旋能斯特响应由于磁振子朗道水平的形成进行比较,在AFM绝缘体的skyrmion和涡旋-antivortex晶体相类似的拓扑响应。我们的研究表明,AFM绝缘体表现出丰富的物理拓扑磁振子激发。

英文摘要:

We study gauge fields produced by gradients of the Dzyaloshinskii-Moriya interaction and propose a model of AFM topological insulator of magnons. In the long wavelength limit, the Landau levels induced by the inhomogeneous Dzyaloshinskii-Moriya interaction exhibit relativistic physics described by the Klein-Gordon equation. The spin Nernst response due to the formation of magnonic Landau levels is compared to similar topological responses in skyrmion and vortex-antivortex crystal phases of AFM insulators. Our studies show that AFM insulators exhibit rich physics associated with topological magnon excitations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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