论文标题
循环扭曲阶层界面中摩擦缩放定律的起源：模拟和理论
Origin of frictional scaling law in circular twist layered interfaces: simulations and theory
论文作者
论文摘要
基于扭曲的分层材料的结构超级润滑性激发了巨大的研究兴趣。最近的MD模拟表明，圆形扭曲的双层石墨烯（TBLG）呈现出强大的Moiré级振荡的尺寸尺寸。为了揭示观察到的异常缩放的物理起源，我们提出了一个理论公式，并得出了TBLG摩擦尺寸缩放定律的分析表达。预测的扭曲角度缩放定律与MD模拟非常吻合，并为在各种实验中测得的散射功率缩放定律提供了合理的解释。最后，我们表明了明确的证据表明，缩放定律的起源来自莫伊尔边界，即删除内部完整的moiré超级电池后的扭曲分层界面的其余部分。我们的工作为分层材料的摩擦起源提供了新的物理见解，并强调了在分层材料的热力学模型中计算Moiré边界的重要性。
Structural superlubricity based on twisted layered materials has stimulated great research interests. Recent MD simulations show that the circular twisted bilayer graphene (tBLG) presenting a size scaling of friction with strong Moiré-level oscillations. To reveal the physical origin of observed abnormal scaling, we proposed a theoretical formula and derived the analytic expression of frictional size scaling law of tBLG. The predicted twist angle dependent scaling law agrees well with MD simulations and provides a rationalizing explanation for the scattered power scaling law measured in various experiments. Finally, we show clear evidence that the origin of the scaling law comes from the Moiré boundary, that is, the remaining part of the twisted layered interfaces after deleting the internal complete Moiré supercells. Our work provides new physical insights into the friction origin of layered materials and highlights the importance of accounting for Moiré boundary in the thermodynamic models of layered materials.
