优秀的5f电子磁铁的活性化物原子装饰gh-C3N4单层
Tao Xiong1, Yaqing Chen1, Ruizhi Qiu2
1School of Physical Science and Technology, Southwest University, Chongqing, 400715, China. yhk10@swu.edu.cn.
Physical chemistry chemical physics : PCCP
|October 12, 2023
概括
在石墨烯类碳化物上吸附的动氨酸原子具有很高的稳定性和磁性,为新的2D金属磁铁铺平了道路.
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
- 量子化学 是一个量子化学.
背景情况:
- 具有可控制兴奋剂的二维 (2D) 材料对于基础研究和自旋电子应用至关重要.
- 动氨酸 (An) 元素具有独特的电子和磁性,其来源于其5f电子.
研究的目的:
- 为了研究在多孔石墨烯类碳化物 (gh-C3N4) 上吸附的活性化物系列 (Ac-Am) 的结构稳定性,电子特性和磁性行为.
- 探索这些基于乙烯酸的二维材料作为新型金属磁铁的潜力.
主要方法:
- 密度函数理论 (DFT) 的计算.
- 一开始的分子动力学 (AIMD) 模拟.
- 蒙特卡洛 (MC) 的模拟.
- 化学结合分析.化学结合分析.
主要成果:
- 当在gh-C3N4.4的空位上被吸附时,动素原子 (An) 显示出高能量,热和动态稳定性.
- 这种结合涉及主要的离子An-N相互作用和较小的共价An-5f6d和N-2s2p杂交.
- 鲁德曼-基特尔-卡苏亚-约西达 (RKKY) 机制通过6d导电电子调节5f-5f磁交换.
- U@gh-C3N4具有0.6μB的磁矩,53 meV的大磁异性能量 (MAE),以及538 K的高基里温度 (TC).
结论:
- 添加了乙胺的gh-C3N4材料是稳定的,并表现出金属磁性.
- 这些材料对先进的自旋电子设备具有前景,因为它们具有可调节的磁性和金属性质.
- 该U@gh-C3N4系统是一个特别有前途的候选人,用于高性能旋转电子应用.
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