飞行中的静摩擦：运动中润滑剂的速度脱钉转变
Static friction on the fly: velocity depinning transitions of lubricants in motion
摘要：
滑动周期性基底之间的模型固体润滑剂的拖动速度表现出两个制度之间的相变，分别与量子化和连续的润滑剂质心速度。该转变发生在增加作用于润滑剂上的外部驱动力F_ext的情况下，显示出大的滞后，并且具有静摩擦中的脱钉转变的特征，仅在飞行中发生。虽然在性质上不同，这种现象出现同构的静态奥布里脱钉过渡的弗伦克尔-Kontorova模型，颗粒的作用，现在采取的移动扭结的润滑剂-基板界面。我们提出了在二维光晶格实验中的一种可能实现。
英文摘要：
The dragging velocity of a model solid lubricant confined between sliding periodic substrates exhibits a phase transition between two regimes, respectively with quantized and with continuous lubricant center-of-mass velocity. The transition, occurring for increasing external driving force F_ext acting on the lubricant, displays a large hysteresis, and has the features of depinning transitions in static friction, only taking place on the fly. Although different in nature, this phenomenon appears isomorphic to a static Aubry depinning transition in a Frenkel-Kontorova model, the role of particles now taken by the moving kinks of the lubricant-substrate interface. We suggest a possible realization in 2D optical lattice experiments.
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