在二维CrInX2 (X = S,Se,Te) 单层中预测内部室温铁磁性
Yunfei Zhang1, Shuo Zhang1, Minghao Jia2
1School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300132, China. jgtao@hebut.edu.cn.
Physical chemistry chemical physics : PCCP
|February 21, 2024
概括
新的二维铁磁 (FM) 半导体,CrInX2,显示出对自旋电子学的希望. 这些材料具有出色的热稳定性和高基里温度,在实际应用中超过室温.
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
- 固态化学 固态化学
背景情况:
- 对于先进的电子应用,正在积极研究二维 (2D) 材料.
- 铁磁半导体通过结合磁性和半导体性质,为自旋电子设备提供了潜在的潜力.
研究的目的:
- 预测和研究新的二维 (2D) CrInX2 (X = S, Se, Te) 结构.
- 评估它们作为用于自旋电子的实际铁磁 (FM) 半导体的潜力.
主要方法:
- 密度函数理论 (DFT) 的计算用于结构预测和电子属性分析.
- 用声波振动和分子动力学模拟来验证结构和热力学稳定性.
- 计算了磁性特性,包括磁性异性质能量和基里温度 (Tc).
主要成果:
- 新的2D CrInX2结构被预测为稳定的铁磁半导体.
- 对于CrInS2 (1.03 eV) 和CrInSe2 (0.69 eV) 发现了可观的旋转极化带间隙,CrInTe2表现出半金属的行为.
- 计算的基里温度 (Tc) 分别为CrInS2,CrInSe2和CrInTe2为347K,397K和447K,均高于室温.
- 确定了高磁性异构性能量,有助于长距离旋转极化.
结论:
- 研究的2D CrInX2材料由于其铁磁半导体性质和高基里温度,是自旋电子应用的有希望的候选材料.
- 它们的稳定性和电子特性表明了未来设备开发的潜力.
- 阐明了底层的磁交换机制,提供了对它们强大的铁磁性的洞察.
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