Phase transition of atomic chain in the one-dimensional Frenkel-Kontorova model
一维Frenkel-Kontorova（FK）模型原子链的相变研究

The effect of the initial velocity of boundary atom on the motion of an atomic chain is studied by the one-dimensional Frenkel-Kontorova model. The obatined results show that the three phases could be observed in our simulation, these being harmonic phase when vv2. It is aslo shown that the two critical velocites(v1,v2) are strongly influenced by the number of atoms and the depth of the substrate potential.