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arXiv 2511.20060cond-mat.str-el
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有限温度下摩擦磁体中天空之眼晶体的稳定性:六重各向异性和动量空间均匀自旋模式的作用

Finite-temperature stability of skyrmion crystals in frustrated magnets: Role of sixfold anisotropy and uniform spin mode in momentum space

The University of Tokyo(东京大学);Hokkaido University(北海道大学)

Kazuki Okigami, Satoru Hayami

AI总结:

研究摩擦磁体中有限温度下天空之眼晶体的稳定性,通过分析三角晶格经典Heisenberg模型的动量空间交换相互作用,发现六重各向异性和动量空间均匀自旋模式对稳定天空之眼晶体相至关重要。

摘要:

我们通过分析三角晶格经典Heisenberg模型的动量空间交换相互作用,研究了摩擦磁体中有限温度下天空之眼晶体的稳定性。我们的分析识别出两个关键的动量空间特征,对稳定天空之眼晶体相起关键作用。第一个是动量空间交换相互作用中的六重各向异性,它作为锁定势能,有利于三重Q天空之眼晶体。蒙特卡洛模拟显示,较大的各向异性倾向于增强天空之眼晶体在温度-磁场相图中的稳定性区域。第二个因素是与均匀自旋模式相关的动量空间能量,它与有限温度下天空之眼晶体相的出现有关。这些结果提供了进一步理解摩擦磁体中天空之眼晶体相稳定机制的理解,并对设计宿主天空之眼材料有帮助。

英文摘要:

We study the finite-temperature stability of skyrmion crystals in frustrated magnets by analyzing the momentum-space exchange interaction of a classical Heisenberg model on a triangular lattice. Our analysis identifies two key momentum-space features that play a crucial role in stabilizing the skyrmion crystal phase. The first is the sixfold anisotropy in the momentum-space exchange interaction, which acts as a locking potential favoring triple-$Q$ skyrmion crystals. Monte Carlo simulations reveal that a larger anisotropy tends to enhance the stability region of the skyrmion crystal in the temperature--magnetic-field phase diagram. The second factor is the momentum-space energy related to the uniform spin mode, which correlates with the emergence of the skyrmion crystal phase at finite temperatures. These results provide a further understanding of the stabilization mechanism of the skyrmion crystal phase in frustrated magnets and will be useful for the design of skyrmion-hosting materials.

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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