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新的二维Janus β-Ge₂XY (X/Y = S, Se, Te) 结构:第一原则检查

Nguyen Dinh Hien^1,2, D V Lu³, Le C Nhan⁴

¹Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam.

Nanoscale advances

|August 28, 2023

概括

研究人员开发了具有稳定,异构的结构的新型Janus germanium石原化单层 (β-Ge2XY). 这些二维材料具有可调节的半导体特性,显示了先进纳米电子设备的潜力.

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
固态化学固态化学

背景情况:

二维 (2D) 材料由于其缩小的维度而具有独特的特性.
2D结构的异构使各种材料功能成为可能.
单基化物是一种具有电子应用潜力的材料类.

研究的目的:

提出和研究一系列基于β相单基的新型Janus结构.
探索这些新的二维材料的结构稳定性,机械和电子性能.
评估它们对纳米电子应用的适用性.

主要方法:

使用第一原则计算来建模结构和电子属性.
密度函数理论 (DFT) 用于模拟β-Ge2XY单层的行为.
应用双轴应变来研究其对电子带结构的影响.

主要成果:

拟议的Janus β-Ge2XY单层表现出一个稳定的晶体结构.
这些单层具有异构的机械性能.
这些材料是带宽大的半导体,可以通过双轴应变调节.
应变工程可以诱导从间接到直接的带隙过渡.

结论:

已经引入了一种新的类型的Janus日耳曼石化单层 (β-Ge2XY).
这些二维材料表现出稳定的结构和可调节的电子特性.
它们的优越物理特性使它们成为纳米电子学的有希望的候选者.

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