金属团簇的第一性原理计算
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金属团簇的第一性原理计算
目 录
一 论文正文
.
1引言
............................................................................................................................. 1
2计算理论和方法
........................................................................................................ 2
2.1 理论
............................................................................................................... 2
2.1.1 密度泛函理论
........................................................................................... 2
2.1.2 Hohenberg-Kohn 定理
............................................................................. 2
2.1.3 Kohn-Sham方程
........................................................................................ 3
2.2 密度泛函近似
............................................................................................... 4
2.2.1 局域密度近似
........................................................................................... 4
2.2.2 广义梯度近似泛函
................................................................................... 5
2.2.3 杂化密度泛函
........................................................................................... 5
2.3 计算方法
....................................................................................................... 6
2.3.1 GAUSSIAN03
............................................................................................... 6
2.3.2 GAUSSIAN形赝势基组
.............................................................................. 6
2.4 LUMO和HOMO
................................................................................................. 6
3
nAu(n=2-4)的计算
.................................................................................................. 7
4
nAg(n=2-4)的计算
................................................................................................ 10
5
nW(n=4)的计算
................................................................................................ 13
6 结论
.......................................................................................................................... 16
参考文献
...................................................................................................................... 18
谢辞
.............................................................................................................................. 19
二 附录
1 任务书
...................................................................................................................... 20
2 中期检查报告
.......................................................................................................... 22
3 指导教师指导记录表
.............................................................................................. 23
4 结题报告
.................................................................................................................. 24
5 成绩评定及答辩评议表
.......................................................................................... 26
6 答辩过程记录
.......................................................................................................... 28
I
金属团簇的第一性原理计算
摘要:本文采用密度泛函理论方法中的杂化泛函B3LYP,以及结合赝势基组
LANL2DZ对金属团簇
nW、
nAu、
nAg(n=2-4)的所有可能结构进行了研究,得到
了这些结构的平均键能,形成能,离解能以及LUMO、HOMO。通过比较离解能
的大小,得出这些团簇为
3Au、
4Au、
3Ag、
4Ag、
3W、
4W的最稳定结构。
关键词:
Au团簇;W团簇;
Ag团簇;密度泛函方法
II
First – Principles calculates of the metal clusters
Abstract: In this paper , We employ density functional theory in the hybrid functional
B3LYP, with pseudopotential basis sets Lanl2DZ to study the metal clusters
nW、
nAu、
nAg(n=2-4)of all possible structure, get the average bond energy of those
structures, formation energy, dissociation energy and the LUMO、HOMO. By
comparing the size of dissociation energy. Come to these clusters as
3Au、
4Au、
3Ag、
4Ag、
3W、
4W the most stable structure.
Keyword: Auclusters;W clusters;
Agclusters;Density function method (DFT)
III
目 录
1引言
............................................................................................................................. 1
2计算理论和方法
........................................................................................................ 2
2.1 理论
............................................................................................................... 2
2.1.1 密度泛函理论
........................................................................................... 2
2.1.2 Hohenberg-Kohn 定理
............................................................................. 2
2.1.3 Kohn-Sham方程
........................................................................................ 3
2.2 密度泛函近似
............................................................................................... 4
2.2.1 局域密度近似
........................................................................................... 4