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Updated: May 20, 2025

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双层类似化合物中的滑动铁电:机制和应用

Dong-Dong Wang¹, Xin-Yi Gao¹, Yan-Dong Guo¹

¹College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China. yandongguo@njupt.edu.cn.

|May 19, 2025

概括

这项研究探讨了双层二维范德瓦尔斯铁电,发现了双层α-SiS中的显著偏振和可调节的偏振 β-MX结构,用于先进的电子应用.

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) 范德瓦尔斯 (vdW) 铁电材料为电子设备提供了独特的特性.
研究主要集中在单层铁电,对双层或多层系统的研究有限.

研究的目的:

为了研究双层α和β相MX (M = Si,Ge,Sn,Pb;X = S,Se,Te) 结构中的滑动铁电.
通过应变和堆叠来探索铁电极化的调制.
评估这些材料在场效应晶体管 (FET) 和逻辑操作中的潜力.

主要方法:

使用第一原则计算来研究双层MX材料的电子和结构性质.
分析了原子组成,应变和堆叠顺序对铁电极化的影响.
对构造的场效应晶体管 (FET) 的性能指标与半导体国际技术路线图 (ITRS) 相比进行了评估.

主要成果:

双层α-SiS表现出显著的外平面极化,在单层形式中不存在.
双叶子β-MX结构表现出由X原子调节的电荷转移影响的周期极化变化.
应变和多层堆叠有效调整极化特性.
构建的FET符合2028年ITRS要求,四个逻辑运营商证明了成功运行.

结论:

比拉耶MX材料为先进的铁电应用提供了有前途的途径.
通过结构修改来实现两极化的可调性提供了设计灵活性.
这些发现有助于开发下一代电子设备和逻辑操作.

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