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在二维素结合有机框架 (XOFs) 中对拓状态的理论预测

Yixuan Gao¹, Yiyang Yin², Lizhi Zhang³

¹State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China. gaoyixuan@ustb.edu.cn.

Physical chemistry chemical physics : PCCP

|July 28, 2025

概括

新合成的素结合有机框架 (XOFs) 表现出拓性质和半金属的卡戈梅波段. 化XOF表现出增强的磁性,这表明拓量子设备的潜力.

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:

像COF,MOF和HOF这样的二维 (2D) 晶体多孔框架对拓量子状态有希望.
这些材料中预测的拓状态的实验验证是有限的.

研究的目的:

研究新型素结合有机框架 (XOF) 的拓和磁性特性.
探索拓量子设备中的潜在应用.

主要方法:

系统的第一原则计算.
旋转轨道合 (SOC) 的分析.
蒙特卡洛模拟用于磁性属性.

主要成果:

在XOF中确定了Fermi水平附近的半金属Kagome带结构.
通过在SOC诱导的差距内的非小的边缘状态确认拓性质.
与I基类似物相比,Br替代的XOF表现出更强的铁磁相互作用和更高的基里温度 (~100K).

结论:

XOFs代表了一个探索拓量子现象的新平台.
由于增强的磁性,Br-TPEB显示出作为拓量子设备的候选材料的希望.

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