自然科学版
陕西师范大学学报(自然科学版)
物理学
Tin(n=2~6)团簇的平衡结构及其热力学性质
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温俊青,陈国祥
(西安石油大学 理学院, 陕西 西安 710065)
温俊青,女,博士研究生,讲师,主要从事团簇研究.
摘要:
用密度泛函理论(Density Functional Theory, DFT)的Slater Vosko Wilk Nisair(SVWN)方法及Becke 3Lee Yang Parr (B3LYP)方法,对Tin(n=2~6)团簇的平衡构型和热力学特性进行了研究.结果表明,团簇的结构为密堆型,它不同于块体且随尺度发生一定的变化,添加一个原子并不显著改变母本团簇的结构.团簇的总能量ET随尺度单调减小,团簇的零点能(EZP)、热容(c0p)和标准熵(S0)随尺度单调增加.
关键词:
密度泛函理论;团簇;平衡构型
收稿日期:
2007-10-08
中图分类号:
O642
文献标识码:
A
文章编号:
1672-4291(2008)04-0040-03
基金项目:
国家自然科学基金资助项目(10647008);西安石油大学科技创新基金资助项目(2006-41)
Doi:
Equilibrium geometries and thermodynamics properties of Tin(n=2~6) clusters
WEN Jun-qing, CHEN Guo-xiang
(College of Science, Xi′an Shiyou University, Xi′an 710065, Shaanxi, China)
Abstract:
The equilibrium geometries and thermodynamics properties of Tin(n=2~6) have been investegated by using the methods of Slater Vosko Wilk Nisair (SVWN) and Becke 3Lee Yang Parr (B3LYP) of the density functional theory (DFT) at Lanl2dz level. It is shown that the configuration of clusters is a dense-pile model and is different from the bulk structure. The configuration of clusters has a certain changes with size, but its intrinsic configuration can not be changed by adding an atom. The total energy of the cluster decreases monotonically with size. The EZP、c0p and S0 of the clusters increases monotonically with size.
KeyWords:
density functional theory; clusters; equilibrium geometries