摘要
The ground state of a generalized Frenkel–Kontorova model with a transversal degree of freedom is studied.When the coupling strength,K,and the frequency of a single−atom vibration in the transversal direction,ω0y,are increased,the ground state of the model undergoes a transition from a two−dimensional configuration to a one-dimensional one.This transition can manifest in different ways.Furthermore,we find that the prerequisite of a two-dimensional ground state isθ≠1/q.
作者
YUAN Xiao-Ping
ZHENG Zhi-Gang
袁晓平;郑志刚(Department of Physics and the Beijing-Hongkong-Singapore Joint Center for Nonlinear and Complex Systems(Beijing),Beijing Normal University,Beijing 100875;Information Engineering School,Hangzhou Dianzi University,Hangzhou 310018)
基金
Supported in part by the National Natural Science Foundation of China under Grant Nos.10875011 and 11075016
the National Basic Research Program of China under Grant No.2007CB814805
the Foundation of Doctoral Training(No.20100003110007)
the Fundamental Research Funds for the Central Universities
the Natural Science Foundation from the Educational Commission of Zhejiang Province(GK100801067).
