湖南文理学院学报(自然科学版)
湖南文理學院學報(自然科學版)
호남문이학원학보(자연과학판)
JOURNAL OF HUNAN UNIVERSITY OF ARTS AND SCIENCE(SCIENCE AND TECHNOLOGY)
2013年
3期
25-28
,共4页
锡硫体系%密度泛函理论%第一性原理%交换-相关能
錫硫體繫%密度汎函理論%第一性原理%交換-相關能
석류체계%밀도범함이론%제일성원리%교환-상관능
Sn-S system%density function theory%first-principles%exchange-correlation energy
为了解锡硫化合物的性质,对Sn-S体系中化合物进行了第一性原理研究,优化了Sn-S体系中化合物的结构。研究表明计算时采用局域密度近似(LDA)比广义梯度近似(GGA)能更好地描述该体系的交换-相关能,从而在对该体系进行进一步研究时,采用LDA进行计算能得到更好的优化结果。计算所获得该体系化合物形成能及结合能的计算结果显示,在形成化合物过程中SnS 2优先于Sn 2 S 3形成。
為瞭解錫硫化閤物的性質,對Sn-S體繫中化閤物進行瞭第一性原理研究,優化瞭Sn-S體繫中化閤物的結構。研究錶明計算時採用跼域密度近似(LDA)比廣義梯度近似(GGA)能更好地描述該體繫的交換-相關能,從而在對該體繫進行進一步研究時,採用LDA進行計算能得到更好的優化結果。計算所穫得該體繫化閤物形成能及結閤能的計算結果顯示,在形成化閤物過程中SnS 2優先于Sn 2 S 3形成。
위료해석류화합물적성질,대Sn-S체계중화합물진행료제일성원리연구,우화료Sn-S체계중화합물적결구。연구표명계산시채용국역밀도근사(LDA)비엄의제도근사(GGA)능경호지묘술해체계적교환-상관능,종이재대해체계진행진일보연구시,채용LDA진행계산능득도경호적우화결과。계산소획득해체계화합물형성능급결합능적계산결과현시,재형성화합물과정중SnS 2우선우Sn 2 S 3형성。
In order to understand the properties of Sn-S compounds and optimize the structure of the Sn-S compounds, compounds of Sn-S system have been studied by the first-principles. The result shows that LDA was better to describe exchange-correlation energy of this system than GGA, which in the system for further study, using LDA calculated can get better optimization results. As shown in calculation results for the system compounds formation energy and binding energy, SnS2 was preferential formation to Sn2S3 in the process of compounds formation.