%0 Journal Article
%T Magnetism and phonon softening of LiFeAs superconductors<br>LiFeAs超导体中磁性与声子软化
%A Li Bin
%A Xing Zhong-Wen
%A Liu Mei
%A <br>李斌
%A 邢钟文
%A 刘楣
%J 物理学报
%D 2011
%I 
%X Using the first principles calculations based on density functional theory, we study the electronic band structure, the phonon dispersion, and the phonon density of states of the iron-based superconductor LiFeAs. The obtained ground state of LiFeAs is of the fluctuated antiferromagnetic order and partial structural relaxation. A comparson of phonon densities of states between in the striped antiferromagnetic ordering and in the nonmagnetic state indicates that the anisotropic spin interactions result in phonon softening of Fe and As atomic vibrations, thereby enhancing the electron-phonon coupling. As a result, the spin-phonon interaction plas an important role in the unconventional superconductivity.
%K iron-based superconductor
%K anti-ferromagnetic order
%K superconductivity
%K electron-phonon coupling<br>铁基超导体
%K 反铁磁序
%K 超导电性
%K 电声子耦合
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=27C14E609A3E452C4655B2DEC7F9CB11&yid=9377ED8094509821&vid=BFE7933E5EEA150D&iid=DF92D298D3FF1E6E&sid=CA82F44BE387A24B&eid=CA82F44BE387A24B&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=30