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Ta2O5能带结构与性质的第一性原理模拟
引用本文:马浩.Ta2O5能带结构与性质的第一性原理模拟[J].鸡西大学学报,2013(12):67-70.
作者姓名:马浩
作者单位:中国矿业大学材料学院,江苏徐州221116
基金项目:本文获得国家大学生创新训练计划项目(201211290106)资助.
摘    要:Ta2O5是一种在薄膜材料中具有重要用途的晶体材料。采用第一性原理平面波赝势法,分别计算了本征态Tazos晶体以及存在0空位(Vo)、Ta空位(VTa)、0反替位Ta(Ota)和O间隙(Oi)本征缺陷时Ta2O5晶体的态密度和能带结构,得到了不同的带隙值并对计算结果进行了分析,该结果表明0反替位Ta(OTa)缺陷存在时对Tazos晶体能带结构的带隙值影响最大,其次是O空位(Vo)。

关 键 词:Ta2O5晶体  本征缺陷  第一性原理  能带结构  态密度

First- principle Calculations of the Band Gap and Properties of Ta2O5
Ma Hao.First- principle Calculations of the Band Gap and Properties of Ta2O5[J].JOurnal of Jixi University:comprehensive Edition,2013(12):67-70.
Authors:Ma Hao
Institution:Ma Hao (School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China)
Abstract:Ta2O5 is a very important crystal material in thin film material . Based on the plane wave ultrasofi pseudopotential method , we calculate the density state and the band structure energy of the original state of Ta2O5 crystals as well as the existence of O vacancies (Vo), Ta vacancy (VTa), O counter for Ta(Ota) and O clearance defects(Oi). We got the different band gap val- ues and analyzed the calculated results, the results showed that the O counter for Ta(Ota) defects had the greatest effect to the band structure of Ta2O5 crystal, followed by O vacancies (Vo).
Keywords:Ta2O5 crystals  original defects  first principles  band structure  density of states
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