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在垂直范德瓦尔斯材料中记忆应变诱导的莫伊尔图案

Aditya Dey¹, Nazmul Hasan², Stephen M Wu^2,3

¹Department of Mechanical Engineering, University of Rochester, Rochester, New York 14611, United States.

ACS applied materials & interfaces

|March 4, 2025

概括

范德瓦尔斯材料的应变工程提供了一种新的方法,可以在不扭曲的情况下创建moiré图案. 这种方法确保了统一和可重复的量子材料,克服了传统的对齐挑战.

科学领域:

凝聚物质物理学凝聚物质物理学
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

范德瓦尔斯 (vdW) 材料中的莫伊尔图案通常由扭曲的层组成,这可能导致对齐问题和不均.
应变工程提出了一种用于生成moiré模式的替代方法,可能提供更好的控制和可重现性.

研究的目的:

在垂直堆叠的石墨烯中阐明应变诱导的莫雷图案形成的机械原理.
调查局部菌株分布和层间滑落在创造这些模式中的作用.
为了证明应变诱导的摩埃尔图案的稳定性和可重复性.

主要方法:

原子模拟被用来模拟垂直堆叠的石墨烯在应力下的行为.
进行了局部菌株分布的分析,以了解模式演变.
研究了层间滑动的过程,以确定moiré形成的关键阶段.

主要成果:

一个三阶段的层间滑动过程被确定为应变诱导的moiré图案形成的机制.
由此产生的三角形moiré域被发现是稳定的,即使在去除施加的应变后也保留了它们的结构.
一个逐步加载过程被证明可以实现统一的moiré域,而无需增加应变大小.

结论:

应变工程提供了一种强大且可重复的方法,用于在VDW材料中创建统一的莫雷超级格子.
这种方法克服了扭曲角度诱导方法的局限性,使量子材料的晶圆尺度制造成为可能.
应变诱导的moiré图案的稳定性简化了它们在先进材料设计中的应用.

关键词:

原子学模拟的原子学模拟接口机制接口机制机器学习的原子间潜力.菌株记忆力菌株记忆力应变诱导的莫伊尔图案.

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