摘要
Nonlinear dynamics of the sliding process of a chain driven with a constant velocity at one end in a periodic substrate potential is investigated. The driven chain exhibits distinctly different dynamical characteristics at different velocities. In the low velocity region, the chain moves in a stick-slip manner. When the driving velocity is increased, the stick-slip behaviour is replaced by complicated and regular oscillatory motions. The dependence of the dynamics on the coupling strength is studied and the step-like behaviour is found, where different steps correspond to different dynamical phases.
Nonlinear dynamics of the sliding process of a chain driven with a constant velocity at one end in a periodic substrate potential is investigated. The driven chain exhibits distinctly different dynamical characteristics at different velocities. In the low velocity region, the chain moves in a stick-slip manner. When the driving velocity is increased, the stick-slip behaviour is replaced by complicated and regular oscillatory motions. The dependence of the dynamics on the coupling strength is studied and the step-like behaviour is found, where different steps correspond to different dynamical phases.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 70431002 and 10575010, the Foundation of Doctoral Training of High Education of China （No 20060027009）, the Foundation for the Authors of National Excellent Doctoral Dissertation of China under Grant No 200120, the Teaching and Research Award Programme for 0utstanding Young Teachers in Higher Education of China under Grant No 209, and the National Basic Research Programme of China under Grant No 2007CB814800.
