%0 Journal Article
%T Lattice dynamics study of low energy guest--host coupling in clathrate hydrate<br>Lattice dynamics study of low energy guest-host coupling in clathrate hydrate
%A Yang Yue-Hai
%A Dong Shun-Le
%A Wang Lin
%A <br>杨岳海
%A 董顺乐
%A 王 琳
%J 中国物理 B
%D 2008
%I 
%X Our lattice dynamics simulation of Xe-hydrate with four-site TIP4P oxygen-shell model can accurately reproduce each peak position in the inelastic incoherent neutron scattering spectrum at the acoustic band (below 15\,meV) and yield correct relative intensity. Based on the results, the uncertain profile at $\sim $6\,meV is assigned to anharmonic guest modes coupled strongly to small cages. Blue shift is proposed in phonon dispersion sheet in the case of anticrossing and found to be an evident signal for guest--host coupling that explains the anomalous thermal conductivity of clathrate hydrate.
%K lattice dynamics
%K clathrate hydrate
%K guest--host coupling
%K anticrossing<br>点阵动力学
%K 格子水合物
%K 客体-主体耦合
%K 交叉技术
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=07E9D5536E1C4B354863BA9F8843E527&yid=67289AFF6305E306&vid=BCA2697F357F2001&iid=CA4FD0336C81A37A&sid=B7BFA4B351E4C682&eid=9F8C5EF901EA1E7E&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=0