计算物理 ›› 2005, Vol. 22 ›› Issue (5): 437-443.

• 研究论文 • 上一篇    下一篇

Rhn(n=2~20)团簇结构和磁特性

陈金春   

  1. 江苏盐城工学院, 江苏 盐城 224002
  • 收稿日期:2004-06-22 修回日期:2004-12-27 出版日期:2005-09-25 发布日期:2005-09-25
  • 作者简介:陈金春(1950-),male, Yancheng, Jingsu associate professor, Master of Science, Research in solid state physics.

Size Dependence of Structural and Magnetic Properties of Rhn(n=2~20) Clusters

CHEN Jin-chun   

  1. Yancheng Institute of Technology, Yancheng 224002, China
  • Received:2004-06-22 Revised:2004-12-27 Online:2005-09-25 Published:2005-09-25

摘要: 使用紧束缚近似多体势和遗传算法,计算了Rhn(n=2~20)团簇的基态结构.据优化结构计算了平均键长(R) ,平均配位数(CN) ,单原子平均束缚能Eb,使用自洽的4d,5s ,5p价电子紧束缚模型,计算了单原子平均磁矩μn和Rhn(n=15,17,18,19)团簇的总的平均电子态密度.结果初步揭示了小铑团簇结构、电子和磁特性之间的关系.

关键词: 铑团簇, 遗传算法, 结构, 磁性

Abstract: The ground-state geometries of Rhn(n=2~20) clusters are calculated with a TB many-body potential in the Genetic Algorithm(GA). Based on the optimized geometries, we calculate the average bond length(R), average coordination number(CN), average binding energy Eb per atom. The average magnetic moment per atom μn and the average total density of states(DOS) of Rhn(n=15,17,18,19) clusters are calculated in a self-consistent tight-binding model considering 4 d, 5 s, 5 p valence electrons with both global and local neutrality. Our result reveals relations between structure and electronic and magnetic properties of small Rh clusters.

Key words: rhodium cluster, genetic algorithm, ground-state geometry, magnetism

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