Dynamical transitions in correlated driven diffusion in a periodic potential

2019-10-16 08:24:35

potential particles diffusion periodic interacting

责任者: Braun, O.M.;Dauxois, T.;Paliy, M.V.;Peyrard, M. 单位: Lab. de Phys., CNRS, Lyon, France 来源出处: Physical Review Letters(Phys. Rev. Lett. (USA)),1997/02/17,78(7):1295-8 摘要: The diffusion of a two-dimensional array of particles driven by a constant force in the presence of a periodic external potential exhibits a hierarchy of dynamical phase transitions when the driving force is varied. This behavior can be explained by a simple phenomenological approach which reduces the system of strongly interacting particles to weakly interacting quasiparticles (kinks). The richness of the strongly coupled system is, however, not lost because, contrary to a single Brownian particle, the array shows an hysteretic behavior even at nonzero temperature. The present investigation can be viewed as a first step toward understanding nanotribology 关键词: diffusion;hysteresis;nanostructured materials;phase transformations;quasiparticles;tribology;dynamical transitions;correlated driven diffusion;periodic potential;two-dimensional array;particles;constant force;periodic external potential;hierarchy;dynamical phase transitions;phenomenological approach;strongly interacting particles;weakly interacting quasiparticles;kinks;strongly coupled system;hysteretic behavior;nonzero temperature;nanotribology