Ni(n=2~20)团簇的结构

被引:18
作者
孙厚谦
任云
王广厚
机构
[1] 盐城工学院基础部
[2] 南京大学物理系 盐城
[3] 南京市
关键词
遗传算法; 经验势; 团簇结构;
D O I
暂无
中图分类号
O481 [固体理论];
学科分类号
070205 ; 0805 ; 080502 ; 0809 ;
摘要
使用经验势和遗传算法 (GeneticAlgorithm) ,得到了Nin(n =2~ 2 0 )团簇的平衡结构和束缚能。对于小的团簇 (Ni2 ~Ni6) ,所得到的结果与基于第一性原理密度泛函的计算相一致。结果表明 ,团簇的结构不同于块体且随尺度发生引人注日的变化。每原子平均束缚能Eb 随尺度单调增长。根据过渡金属团簇表面原子配位数与电离势 (IP)的一个解析表达式计算所得的电离势与实验结果基本一致。由基态能量对分裂途径(FragmentationChannels)的分析表明 ,失去二聚体 (Dimer)在能量上是优先的。同时将计算所得的结构与Nin团簇吸收N2 的实验所推得的结构进行了比较
引用
收藏
页码:387 / 392
页数:6
相关论文
共 10 条
[1]  
Near-threshold photoionization of nickel clusters: Ionization potentials for Ni3 to Ni90. M. B. Knickelbein,S. Yang,S. J. Riley. The Journal of Chemical Physics . 1990
[2]  
Size and structural dependence of the magnetic properties of small 3 d-transition-metal clusters. G. M. Pastor,J. Doranter-Dvila,K. H. Bennemann. Physical Review . 1989
[3]  
Structure and properties of Ni7 cluster isomers. S. K. Nayak,B. Reddy,B. K. Rao,S. N. Khanna,P.Jena. Chemical Physics Letters . 1996
[4]  
Ionization potentials of transition metal clusters. J. J. Zhao,M. Han,G. H. Wang. Physical Review . 1993
[5]  
Structural, electronic,and magnetic properties of small rhodium clusters. Y. Jinlong,F. Yoigo,W. Kelin. Physical Review . 1994
[6]  
Geometry, electronic structure, and magnetism of small Ni n ( n =2~6, 8, 13 )clusters. F. A. Reuse,S. N. Khanna. Chemical Physics Letters . 1995
[7]  
Molecular geometry optimization with a Genetic Algorithm. D. M. Deaven,K. M. Ho. Physical Review Letters . 1995
[8]  
Clusters of transition-metal atoms. M. D. Morse. Chemical Reviews . 1986
[9]  
Electronic structure and magnetism of Rh n ( n = 2~13) clusters. B. V. Reddy,S. K. Nayak,S. N. Khanna,B. K. Rao,P.Jena. Physical Review . 1999
[10]  
Physics of Nockel Clusters: Energetics and Equilibrium Geometries. S. K. Nayak,S. N. Khanna,B. K. Rao,P. Jena. The Journal of Physical Chemistry . 1997