Lubricated friction in Frenkel–Kontorova model between incommensurate surfaces

We study the superlubricity in the generalized Frenkel–Kontorova model. Each particle of the top layer is driven by external dc driving force F ext . When the ratios of the three inherent length scales of the system are chosen to be the Golden Mean ( a / b = 233 / 144 , c / a = 144 / 89 ), we find that there exists a critical interparticle interaction strength above which the static friction force F su of the top layer is zero. And F su could easily flow into the low friction with existing the lubricant layer.