计算物理 ›› 2011, Vol. 28 ›› Issue (4): 598-604.

• 研究论文 • 上一篇    下一篇

WnC0,±(n=1,…,6)团簇结构与电子性质的理论研究

张秀荣, 康张李, 李扬   

  1. 江苏科技大学数理学院, 江苏 镇江 212003
  • 收稿日期:2010-07-23 修回日期:2010-09-19 出版日期:2011-07-25 发布日期:2011-07-25
  • 作者简介:张秀荣(1957-),女,河北曲阳,教授,主要从事计算原子与分子物理和团簇物理研究,E-mail:zh4403701@126.com
  • 基金资助:
    江苏省普通高校研究生科研创新计划(批准号:CX09S_002Z)资助项目

Structure and Electronic Properties of WnC0,±(n=1,…,6) Clusters

ZHANG Xiurong, KANG Zhangli, LI Yang   

  1. School of Mathematics and Physics, Jiangsu University of Science and Technology, Jiangsu 212003, China
  • Received:2010-07-23 Revised:2010-09-19 Online:2011-07-25 Published:2011-07-25

摘要: 利用密度泛函理论(DFT)中的杂化密度泛函B3LYP在Lanl2dz基组水平上对WnC0,±(n=1,…,6)团簇的各种可能构型进行几何结构优化,得出它们的基态构型,并对基态构型的稳定性和电子性质进行理论研究.结果表明,当n > 3时,稳定构型从平面转变成立体结构,同时C原子趋向于表面最稳定;C原子的掺入使得Wn团簇的稳定性增强,其中W3C团簇稳定性最高,可看作WnC0,±(n=1,…,6)团簇的结构基元;通过比较WnC与纯Wn团簇的垂直亲和能(VEA)和垂直电离能(VIP)可知,WnC团簇更易得到电子,非金属性增强.

关键词: WnC0, ±, (n=1, …, 6)团簇, 几何结构, 电子性质, 密度泛函理论

Abstract: Possible equilibrium geometries of WnC0,±(n=1,…,6) clusters are optimized with density functional theory at B3LYP/LANL2DZ level.Stability and electronic properties of ground state structures are analyzed.It shows that as n > 3 cluster undergoes a transition from a two-dimensional structure to a three-dimensional structure,and carbon atom remains on the surface of cluster.Stability of Wn cluster is increased with doped carbon atom.Moreover W3C is the most stable one among WnC0,±(n=1,…,6) clusters,and it is taken as a basic structure.Electronic properties of WnC0,±(n=1,…,6) clusters are characterized by analyzing energy gaps,vertical electron affinities(VEA) and vertical ionization potentials(VIP) of WnC with pure Wnclusters.WnC clusters get electron easily and shows higher nonmetallicity than Wn clusters.

Key words: WnC0,±(n=1,…,6) clusters, geometry, electronic properties, density functional theory

中图分类号: