%0 Journal Article
%T Two-dimensional discrete gap breathers in a two-dimensional discrete diatomic Klein-Gordon lattice<br>
%A XU Quan
%A QIANG Tian
%A <br>
%J 中国物理快报
%D 2009
%I 
%X We study the existence and stability of two-dimensional discrete breathers in a two-dimensional discrete diatomic Klein-Gordon lattice consisting of alternating light and heavy atoms, with nearest-neighbor harmonic coupling. Localized solutions to the corresponding nonlinear differential equations with frequencies inside the gap of the linear wave spectrum, i.e. two-dimensional gap breathers, are investigated numerically. The numerical results of the corresponding algebraic equations demonstrate the possibility of the existence of two-dimensional gap breathers with three types of symmetries, i.e., symmetric, twin-antisymmetric and single-antisymmetric. Their stability depends on the nonlinear on-site potential (soft or hard), the interaction potential (attractive or repulsive) and the center of the two-dimensional gap breathers (on a light or a heavy atom).
%K 05
%K 45
%K Xt
%K 02
%K 30
%K Jr
%K 63
%K 20
%K Pw
%K 63
%K 20
%K Ry<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=2FA7E057463704FAC64DC50A8B29DE22&yid=DE12191FBD62783C&vid=96C778EE049EE47D&iid=DF92D298D3FF1E6E&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0