摘要
利用密度泛函理论中的广义梯度近似(GGA)对Pb_nS(n=1~13)团簇进行几何结构优化,并对能量和频率进行计算,得到了Pb_nS(n=1~13)团簇的基态结构和稳定结构.计算结果表明:Pb_nS团簇的平均结合能比Pb_n团簇的平均结合能要大,且n=4和10为Pb_ nS团簇的幻数.在Pb_nS团簇中,电荷都是从Pb原子向S原子转移且以共价键和离子键共存.
Geometric structures of PbnS(n=1-13) clusters are optimized using the generalized gradient approximation(GGA) density functional theory, The energy and frequency are calculated, the ground state structures and equilibrium structures of Pb, S(n = 1 - 13)clusters are obtained. The calculated results show that the average binding energy of Pb.S clusters is higher than that of Pbn clusters,and 4 and 10 are the magic numbers of PbnS clusters. Charge transfers from the Pb atom to the S atom and co-existence of ionic and covalent bonding in PbnS clusters.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2009年第5期841-847,共7页
Journal of Atomic and Molecular Physics
基金
国家自然科学基金(20371015
90306010)
关键词
PbnS团簇
基态结构
电子性质
PbnS clusters, the ground state structures, electronic properties
作者简介
伍良福(1975-),男,江西抚州人,河南大学特种功能材料教育部重点实验室凝聚态物理理论硕士研究生,主要从事团簇研究.E-mail:wulf200806@163.com
通讯作者:李蕴才.E-mail:liyuncai@henu.edu.cn