Liu Jianxin, Yang Xiaoqi, Fang Hui, Yan Weidong, Ouyang Wengen, Liu Ze
Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan, Hubei, 430072, China.
State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, Hubei, 430072, P. R. China.
Adv Mater. 2023 Oct 22:e2305072. doi: 10.1002/adma.202305072.
Twistronics, an emerging field focused on exploring the unique electrical properties induced by twist interface in graphene multilayers, has garnered significant attention in recent years. The general manipulation of twist angle depends on the assembly of van der Waals (vdW) layered materials, which has led to the discovery of unconventional superconductivity, ferroelectricity, and nonlinear optics, thereby expanding the realm of twistronics. Recently, in situ tuning of interlayer conductivity in vdW layered materials has been achieved based on scanning probe microscope. In this Perspective, the advancements in in situ twistronics are focused on by reviewing the state-of-the-art in situ manipulating technology, discussing the underlying mechanism based on the concept of structural superlubricity, and exploiting the real-time twistronic tests under scanning electron microscope (SEM). It is shown that the real-time manipulation under SEM allows for visualizing and monitoring the interface status during in situ twistronic testing. By harnessing the unique tribological properties of vdW layered materials, this novel platform not only enhances the fabrication of twistronic devices but also facilitates the fundamental understanding of interface phenomena in vdW layered materials. Moreover, this platform holds great promise for the application of twistronic-mechanical systems, providing avenues for the integration of twistronics into various mechanical frameworks.
扭曲电子学是一个新兴领域，专注于探索石墨烯多层膜中扭曲界面所诱导的独特电学性质，近年来受到了广泛关注。扭曲角的一般操控依赖于范德华（vdW）层状材料的组装，这导致了非常规超导、铁电性和非线性光学的发现，从而扩展了扭曲电子学的领域。最近，基于扫描探针显微镜实现了对vdW层状材料层间电导率的原位调控。在这篇展望文章中，通过回顾最新的原位操控技术、基于结构超润滑概念讨论其潜在机制以及利用扫描电子显微镜（SEM）下的实时扭曲电子学测试，聚焦于原位扭曲电子学的进展。结果表明，SEM下的实时操控能够在原位扭曲电子学测试过程中可视化并监测界面状态。通过利用vdW层状材料独特的摩擦学性质，这个新颖的平台不仅增强了扭曲电子学器件的制造，还促进了对vdW层状材料中界面现象的基础理解。此外，这个平台在扭曲电子学 - 机械系统的应用方面具有巨大潜力，为将扭曲电子学集成到各种机械框架中提供了途径。
