边缘能量涨落：扭曲层状材料界面摩擦标度律的统一理论
Edge energy fluctuation: A unified theory of friction scaling laws in twisted layered material interfaces
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中文总结 AI 辅助
本文提出边缘能量涨落（EEF）概念，统一解释扭曲层状材料界面的摩擦标度律，并展示通过分级边缘实现摩擦工程化控制。\n
中文摘要 AI 辅助
范德华（vdW）层状材料中的层间扭曲会产生莫尔超晶格，为调控其电子和力学功能提供了独特机遇。在此，基于两个关键见解——完整莫尔瓦片在滑动过程中势能不变，以及滑块边缘引起的对称性破缺效应——我们提出了边缘能量涨落（EEF）的概念，并证明EEF主导了有限尺寸滑块的滑动能垒。有趣的是，我们发现即使在固定的扭曲角度和滑动方向下，当滑块边缘沿不同方向切割时，也会出现显著的摩擦各向异性，导致不同的摩擦标度律。此外，我们提出了一种通过有意引入分级边缘来工程化扭曲层状材料界面摩擦的范式，为超润滑器件中的摩擦控制提供了一条有前景的途径。
英文摘要
Interlayer twisting in van der Waals (vdW) layered materials generates moire superlattices, unlocking unique opportunities for engineering their electronic and mechanical functionalities. Here, building on two key insights - the invariance of the potential energy of complete moire tiles during sliding, and the symmetry-breaking effect induced by the slider edge - we propose the concept of edge energy fluctuation (EEF) and demonstrate that the EEF governs the sliding energy barrier of finite-sized sliders. Interestingly, we found that even at a fixed twist angle and sliding direction, significant frictional anisotropy emerges when the slider edge is cut along different directions, resulting in distinct friction scaling laws. Furthermore, we present a friction engineering paradigm for twisted layered material interfaces through the deliberate introduction of hierarchical edges, offering a promising route for friction control in superlubric devices.
发表机构
- Wuhan University（武汉大学）
- State Key Laboratory of Water Resources & Hydropower Engineering Science, Wuhan University（武汉大学水资源与水电工程科学国家重点实验室）
机构由 AI 辅助整理，请以论文原文为准。
