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arXiv 2112.00517cond-mat.mes-hall
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自旋螺旋态的手征响应作为自旋织构手征输运指纹的来源

Chiral response of spin spiral-states as the origin of chiral transport fingerprints of spin textures

Jonathan Kipp, Fabian R. Lux, Yuriy Mokrousov

摘要:

随着实验数据和理论模拟的不断增加,非平凡自旋织构的输运性质正受到越来越多的关注。为了扩展普遍接受的但简化和近似的图像传输效应发生在系统中的空间变化的磁化,重要的是要了解的自旋纹理$-$的同手性自旋螺旋状态的积木的传输特性。本文利用基于梯度展开的唯象对称性理论和Kubo框架下的显式计算,研究了强自旋-轨道相互作用的二维模型中各种自旋螺旋的输运性质.特别地,我们着重讨论了对螺旋态的手征敏感的平面霍尔效应和反常霍尔效应对磁导的贡献。我们分析的出现,对称性,以及由此产生的手征磁导性,手征平面霍尔效应,手征霍尔效应的自旋螺旋传播方向,锥角,螺距和无序强度方面的微观特性。我们的研究结果表明,在磁体中的自旋螺旋状态的存在下,可以很容易地检测到在各种类型的磁输运设置。此外,相当大的幅度的手性贡献的导电性的skyrmions估计从纯手性螺旋意味着手性,而不是拓扑,磁输运可以发挥突出的作用,为检测非平凡的自旋纹理。

英文摘要:

The transport properties of non-trivial spin textures are coming under closer scrutiny as the amount of experimental data and theoretical simulations is increasing. To extend the commonly accepted yet simplifying and approximate picture of transport effects taking place in systems with spatially varying magnetization, it is important to understand the transport properties of building blocks for spin textures $-$ the homochiral spin-spiral states. In this work, by referring to phenomenological symmetry arguments based on the gradient expansion, and explicit calculations within the Kubo framework, we study the transport properties of various types of spin-spirals in a two-dimensional model with strong spin-orbit interaction. In particular, we focus on the contributions to the magnetoconductivity, the planar Hall effect and the anomalous Hall effect, which are sensitive to the sense of chirality of the spiral states. We analyze the emergence, symmetry, and microscopic properties of the resulting chiral magnetoconductivity, chiral planar Hall effect, and chiral Hall effect in terms of spin-spiral propagation direction, cone angle, spiral pitch, and disorder strength. Our findings suggest that the presence of spin-spiral states in magnets can be readily detected in various types of magnetotransport setups. Moreover, the sizable magnitude of chiral contributions to the conductivity of skyrmions estimated from homochiral spirals implies that chiral, as opposed to topological, magnetotransport can play a prominent role for the detection of non-trivial spin textures.

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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