%0 Journal Article
%T Effect of Nb doping on electronic structure of TiO2/NiTi interface: A first-principle study<br>Nb掺杂对TiO2/NiTi界面电子结构影响的第一性原理计算
%A Wu Hong-Li
%A Zhao Xin-Qing
%A Gong Sheng-Kai
%A <br>吴红丽
%A 赵新青
%A 宫声凯
%J 物理学报
%D 2008
%I 
%X The electronic structure of pure and Nb doped TiO2/NiTi interface have been calculated with the first-principle ultrasoft pseudopotential approach of the plane wave based on the density functional theory aiming at examining the effect of Nb on the electronic structure of the TiO2/NiTi interface. The formation energy calculation results show that the structure with Ti_terminated NiTi matrix and O_terminated TiO2 layer (Ti/O interface) is the most stable one among the four possible interface structures. Based on the optimized Ti/O interface model, the calculation results of the partial density of states, charge population and bond order suggest that the introduction of Nb on the interface strengthens the atomic interactions on the interface, as well as the interactions between the matrix and the oxidation layer in the neighborhood of the interface, which results in the improvement in the interfacial adhesion and the oxidation resistance of NiTi intermetallic compound.
%K NiTi intermetallic compound
%K TiO2/NiTi interface
%K electronic structure
%K first-principle calculation<br>NiTi金属间化合物
%K TiO2/NiTi界面
%K 电子结构
%K 第一性原理计算
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=AF9795521A40F885D82E8179082AF0E0&yid=67289AFF6305E306&vid=11B4E5CC8CDD3201&iid=59906B3B2830C2C5&sid=C375C9CE6BD563CC&eid=814C907B533424E0&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0