General structure factor and dynamic effects of the Dzyaloshinskii–Moriya interaction in S = 1/2 clusters

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-09-23 DOI:10.1016/j.jmmm.2025.173501

Evan M. Wilson, Joseph A. Prescott, Jason T. Haraldsen

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引用次数: 0

Abstract

Understanding the effects of the Dzyaloshinskii–Moriya interaction (DMI) has become increasingly important in the context of nanoscale magnetism and spintronics. In this study, we derive a general structure factor equation for an S = 1/2 dimer and show that the anisotropic ratio

D_{z} / | J |

and complex phase

ϕ

of the DMI control the gap energy and intensity of the

| 0, 0 〉 \to | 1, 0 〉

transition. Using exact diagonalization of the Heisenberg spin–spin Hamiltonian that incorporates both isotropic and anisotropic interactions, as well as the effects of an external magnetic field and an electric field. Our results show that the DM interaction splits energy eigenstates, induces level repulsion, and significantly modifies the spin dimer structure factor. These effects reveal a direct correspondence between thermodynamic anomalies in the heat capacity and spin-resolved selection rules.

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S = 1/2簇中Dzyaloshinskii-Moriya相互作用的一般结构因子及动力学效应

了解Dzyaloshinskii-Moriya相互作用（DMI）的影响在纳米尺度磁学和自旋电子学的背景下变得越来越重要。本文推导了S = 1/2二聚体的一般结构因子方程，并表明DMI的各向异性比Dz/|J|和复相φ控制着|，0,0 >→|,1,0 >跃迁的间隙能量和强度。利用海森堡自旋-自旋哈密顿量的精确对角化，结合各向同性和各向异性相互作用，以及外部磁场和电场的影响。我们的研究结果表明，DM相互作用分裂能量本征态，诱导能级排斥，并显著改变自旋二聚体的结构因子。这些效应揭示了热容的热力学异常与自旋分辨选择规则之间的直接对应关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.