arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.11270cond-mat.mtrl-sci
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单层CrInX3(X=Te,Se)中的自发磁skyrmions

Spontaneous magnetic skyrmions in single-layer CrInX3(X=Te, Se)

Wenhui Du, Kaiying Dou, Zhonglin He, Ying Dai, Baibiao Huang, Yandong Ma

摘要:

在纳米结构中实现磁性skyrmion在基础研究和器件应用方面都有很大的希望。尽管最近的进展,在二维晶格内的内禀磁性skyrmion探索仍然很少。本文采用第一性原理计算和蒙特卡罗模拟,对单层CrInX 3(X = Te,Se)中的自发磁skyrmions进行了研究.由于反转对称性破缺和强自旋轨道耦合的共同作用,两个体系都存在固有的大的Dzyaloshinskiii-Moriya相互作用,从而在无磁场的情况下产生了有趣的Neel型skyrmions.通过进一步施加适度的磁场,可以获得在较宽温度范围内稳定的skyrmion相。特别是对于单层CrInTe 3,skyrmion的尺寸为亚10 nm,并且skyrmion相可以在180 K的高温下保持。绘制了它们的自旋拓扑织构随磁参数D、J和K变化的相图。我们的结果极大地丰富了二维Skyrmionics物理的研究。

英文摘要:

The realization of magnetic skyrmions in nanostructures holds great promise for both fundamental research and device applications. Despite recent progress, intrinsic magnetic skyrmions in two-dimensional lattice are still rarely explored. Here, using first-principles calculations and Monte-Carlo simulations, we report the identification of spontaneous magnetic skyrmions in single-layer CrInX3 (X = Te, Se). Due to the joint effect of broken inversion symmetry and strong spin-orbit coupling, inherent large Dzyaloshinskii-Moriya interaction occurs in both systems, endowing the intriguing Neel-type skyrmions in the absence of magnetic field. By further imposing moderate magnetic field, the skyrmion phase can be obtained and is stable within a wide temperature range. Particularly for single-layer CrInTe3, the size of skyrmions is sub-10 nm and the skyrmion phase can be maintained at an elevated temperature of 180 K. In addition, the phase diagrams of their topological spin textures under the variation of magnetic parameters of D, J, and K are mapped out. Our results greatly enrich the research of 2D skyrmionics physics.

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