%0 Journal Article
%T First-principles study on the electronic structure and optical properties of YFeO3<br>YFeO3的电子结构和光学性质的第一性原理研究
%A Song Qing-Gong
%A Liu Li-Wei
%A Zhao Hui
%A Yan Hui-Yu
%A Du Quan-Guo
%A <br>宋庆功
%A 刘立伟
%A 赵辉
%A 严慧羽
%A 杜全国
%J 物理学报
%D 2012
%I 
%X Rare-earth orthoferrites (such as YFeO3) with orthorhombic perovskite-type structure are promising candidates in the fields of electrode materials, gas sensors and photocatalysts. The geometric structure, the electronic structure and the optical properties of YFeO3 crystal are investigated by using the plane-wave pseudo-potential method, with the scheme of generalized gradient approximation, revised Perdew-Burke-Emzerhof exchange-correlation potential and ultrasoft pseudopotential. The obtained lattice parameters are in good accordance with experimental results reported. The results confirm that YFeO3 crystal is a direct semiconductor with a gap (Eg) of about 2.22 eV, based on the analyses about band structure, density of state, dielectric function, absorption coefficient, and photoconductivity. It is clarified that YFeO3 crystal and nanocrystalline possess good photocatalytic activities for visible light.
%K YFeO3
%K first-principles
%K electronic structure
%K optical property<br>YFeO3
%K 第一性原理
%K 电子结构
%K 光学性质
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=78F360FC29C47911B9548E2DBFA30997&yid=99E9153A83D4CB11&vid=1D0FA33DA02ABACD&iid=F3090AE9B60B7ED1&sid=30DE18D270053E12&eid=30DE18D270053E12&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=31