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在扭曲的双层和双三层CrI3中探索moiré skyrmions

Bilal Jabakhanji¹, Doried Ghader¹

¹College of Engineering and Technology, American University of the Middle East, Egaila 54200, Kuwait.

Journal of physics. Condensed matter : an Institute of Physics journal

|November 21, 2024

概括

在moiréCrI3中,skyrmion核化是由减少的扭转角度和基板效应所促进的. 随机模拟显示了Dzyaloshinskii-Moriya相互作用 (DMI) 在扭曲的双层和双三层配置中的较低值.

科学领域:

凝聚物质物理学凝聚物质物理学
材料科学是一种材料科学.
这就是Spintronics.

背景情况:

莫伊雷磁体由于相互竞争的相互作用而表现出异国情调的磁性状态.
在moiré三化物 (CrI3) 中观察到非对线性磁性状态.
对于moiré CrI3的原子模拟主要集中在双层系统上.

研究的目的:

在扭曲双层 (tDB) 和双层三层 (tDT) 中调查 skyrmion核化 moiré CrI3.3.
确定Dzyaloshinskii-Moriya相互作用 (th-DMI) 的值,以实现斯基米安稳定.
分析扭转角度和基质诱导的DMI对 skyrmion形成的影响.

主要方法:

随机兰道 - 利夫希茨 - 吉尔伯特模拟.
更多的CRI3异构结构的原子模型.
计算Dzyaloshinskii-Moriya相互作用 (th-DMI) 的值.

主要成果:

在moiré CrI3.3中,th-DMI随着扭转角度的减少而显著降低.
三个skyrmions在th-DMI以上的moiré超细胞的单临床区域内核化.
Skyrmions在接口层中留下印记,基板诱导的DMI进一步降低了th-DMI.
基质诱导的DMI不会影响Skyrmion的局部化.

结论:

小的扭曲角度和基板诱导的DMI是促进moiré结构中 skyrmion形成的关键因素.
这些发现为在莫雷磁体中设计异国情调的磁性状态提供了途径.
这项研究扩大了复杂的莫雷磁系统的原子模拟能力.

关键词:

兹亚洛辛斯基莫利亚相互作用 (DMI)莫伊尔斯克尔米昂斯的情况扭曲的双层CrI3 CrI3 扭曲的三层CrI3

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