密度功能理论研究铁磁SCI2单层中非挥发性电控磁异性质
Jiawen Zhang1, Yaxin Pan1, Yihang Bai2
1Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
Langmuir : the ACS journal of surfaces and colloids
|April 17, 2025
概括
这项研究表明,在一个新的二维多铁结构中,磁性异构的非挥发性电气控制. 操纵铁电极化可以切换磁性和电子状态,为先进的自旋电子设备铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 二维 (2D) 铁磁材料为自旋电子应用提供了潜力.
- 控制磁性异构性对于设备的功能至关重要.
- 多铁体异构结构为探索合的电子和磁现象提供了一个平台.
研究的目的:
- 为了研究范德瓦尔斯异构结构中磁性异构的非挥发性电气控制.
- 探索铁电层和铁磁层之间的合.
- 提出基于可调节的电子和磁性特性的新型自旋电子设备应用.
主要方法:
- 使用第一原理计算来建模范德瓦尔斯异构结构.
- 该系统由铁磁性化 (ScI2) 单层和铁电性化 (In2Se3) 单层组成.
- 分析了与轨道合和极化状态相关的磁性异构性能量.
主要成果:
- 通过对In2Se3极化进行电气操纵,ScI2单层的磁性异构性从XY变为Ising类型.
- I'p和Sc'd轨道的空置 (u) 和被占 (o) 状态之间的合决定了磁性异构的变化.
- 翻转In2Se3极化将异构结构从半导体转换为金属状态.
结论:
- 该研究建立了一种用于2D材料中磁性异构性非挥发性电气控制的方法.
- 提出了一种新的存储设备概念,利用铁电控制来进行数据写入和非破坏性读取.
- 这些发现为先进的spintronics提供了对旋转操纵的新见解.
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