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Er随尺度单调减小,团簇的零点能(EZP)、热容(Cp^0)和标准熵(S^0)随尺度单调增加.
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,CP^0 and S^0 of the clusters increases monotonically with size.
出处
《陕西师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2008年第4期40-42,共3页
Journal of Shaanxi Normal University:Natural Science Edition
基金
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)
关键词
密度泛函理论
团簇
平衡构型
density functional theory
clusters
equilibrium geometries