Molecular dynamics implementation in MSINDO: Study of silicon clusters

被引：26

作者：

Nair, NN ^{[1
]}

Bredow, T ^{[1
]}

Jug, K ^{[1
]}

机构：

[1] Leibniz Univ Hannover, D-30167 Hannover, Germany

来源：

JOURNAL OF COMPUTATIONAL CHEMISTRY | 2004年 / 25卷 / 10期

关键词：

semiempirical methods; MSINDO; molecular dynamics; silicon clusters; melting;

D O I：

10.1002/jcc.20005

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Born-Oppenheimer molecular dynamics is implemented in the semiempirical self-consistent field molecular orbital method MSINDO. The method is employed for the investigation of the structure and dynamics of silicon clusters of various sizes. The reliability of the present parameterization for silicon compounds is demonstrated by a comparison of the results of simulated annealing and of density functional calculations of Si,, clusters (n = 5-7). The melting behavior of the Si-7 cluster is investigated and the MSINDO results are compared to previous high-level calculations. The efficiency of the present approach for the treatment of large systems is demonstrated by an extensive simulated annealing study of the Si-45 and Si-60 clusters. New Si,, and Si-60 structures are found and evaluated. The relative stability of various energy minimum structures is compared with density functional calculations and available literature data. (C) 2004 Wiley Periodicals, Inc.

引用

页码：1255 / 1263

页数：9