在工程设计的Dzyaloshinskii-Moriya相互作用系统中,具有可变拓电荷的磁性 skyrmionic 结构
Heng Niu1, Han Gyu Yoon2, Hee Young Kwon3
1National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, People's Republic of China.
Nature communications
|April 11, 2025
概括
研究人员控制了在室温下磁性 skyrmionic 结构的拓电荷 (Q). 这一突破允许新的方法来操纵这些拓磁性材料的未来应用.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 磁性skyrmions和antiskyrmions表现出复杂的旋转纹理与非微不足道的拓.
- 拓电荷 (Q) 是定义它们的拓特征的关键性质.
- 传统上,Q被认为是不变的,并且由于保存的性性质,难以改变.
研究的目的:
- 通过实验来证明对磁性天体结构的拓电荷 (Q) 的控制.
- 研究空间交替的Dzyaloshinskii-Moriya相互作用 (DMI) 在操纵Q.的作用.
- 探索创建和操纵磁性 skyrmionic 结构与可调节的 Q.
主要方法:
- 使用了一个Dzyaloshinskii-Moriya交互 (DMI) 平台,具有空间交替的符号.
- 采用化学吸收氧气来修改DMI能源格局.
- 研究了接口交叉点与由此产生的拓电荷 (Q) 之间的关系.
主要成果:
- 在磁性 skyrmionic 结构中实现了拓电荷 (Q) 的室温控制.
- 证明Q取决于DMI区域与相反标志之间的交叉口的数量.
- 通过修改DMI能量格局实现了磁性拓过渡.
- 创建了DMI稳定的薄膜抗米子和高Q米子结构.
结论:
- 建立了一种用于控制磁性 skyrmionic 结构的拓电荷 (Q) 的新方法.
- 引入了通过DMI限制来控制skyrmion动态的新自由度.
- 开辟了探索多样化的拓磁性 skyrmionic 结构及其应用的新途径.
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