%0 Journal Article
%T Self-Trapping of Acoustic Polaron in One Dimension
%A HOU Jun-Hua
%A LIANG Xi-Xia
%A <br>侯俊华
%A 梁希侠
%J 中国物理快报
%D 2007
%I 
%X The ground-state energy and effective mass of an acoustic polaron in one dimension are calculated by using an electron-longitudinal-acoustic-phonon interaction Hamiltonian derived here. The self-trapping of the acoustic polaron is discussed. It is found that the critical coupling constant shifts toward weaker electron-phonon interaction with the increasing cutoff wave vector and the products of the critical coupling constant by the cutoff wave vector tend to a certain value. The self-trapping of acoustic polarons in one dimension is easier to be realized than that in three- and two-dimensional systems. The self-trapping transition of acoustic polarons is expected to be observed in the one dimensional systems of alkali halides and wide-band-gap semiconductors.
%K 71
%K 38
%K Fp
%K 73
%K 20
%K Mf
%K 63
%K 20
%K Kr<br>声功率
%K 声学
%K 极化子
%K 物理分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=285F3E9D566C175EF91C5C629591E37A&yid=A732AF04DDA03BB3&vid=B91E8C6D6FE990DB&iid=708DD6B15D2464E8&sid=1126438BA0BA6C30&eid=2BC162CE5215C8A1&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=18