通过贵金属粘附,将二维磁性Cr2TiC2Tx的自旋顺序改变为远程顺序
Jianhui Yang1,2, Fei Shi1, Huaiyuan Zhao1
1Quzhou University, Quzhou 324000, P.R. China.
iScience
|March 4, 2024
概括
研究人员使用Rh层将旋转失序的Cr2TiC2Tx MXene转化为长距离的有序旋转状态. 这为先进的自旋电子应用创造了一个有前途的单层反铁磁铁.
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
- 量子化学 是一个量子化学.
背景情况:
- 目前正在探索MXenes,特别是Cr2TiC2Tx,用于自旋电子应用.
- 在二维材料中实现远程磁性秩序对于自旋电子设备至关重要.
- 在Cr2TiC2Tx的内在旋转失调状态限制了它的旋转潜力.
研究的目的:
- 在Cr2TiC2Tx MXene中设计一个长距离的有序旋转状态.
- 为了研究Rh附着Cr2TiC2Tx表面的磁性特性.
- 评估修改后的Cr2TiC2Tx是否适合于旋转电子应用.
主要方法:
- 用第一原则计算来建模材料.
- 进行了状态密度分析.
- 研究了Rh粘附和不同表面终点 (O和F) 的影响.
主要成果:
- 在Cr2TiC2Tx中,Rh层诱导了从旋转失序状态到旋转有序状态的过渡.
- 该材料被转化为单层A型反铁磁体.
- 增加 (F) 终结增强了交换合常量 (J1) 从0.5到15.9 meV.
- 尼尔温度从8K显著增加到110K,随着F终结的增加.
- Cr2TiC2Tx表现出极好的导电性与O终端和半导体特性与F终端.
结论:
- 具有Rh附着的Cr2TiC2Tx表面可以被设计成单层A型反铁磁体.
- 表面终端在调整磁性和导电性方面发挥着至关重要的作用.
- 修改后的Cr2TiC2Tx是未来自旋电子设备的有希望的候选者,因为它具有可调节的磁顺序和电子特性.
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