中国物理B ›› 2008, Vol. 17 ›› Issue (6): 2116-2123.doi: 10.1088/1674-1056/17/6/029
文振翼1, 任兆玉2, 高继开2, 杜恭贺2, 侯 茹3, 郭平4
Ren Zhao-Yu(任兆玉)a)†, Hou Ru(侯茹)a)b), Guo Ping(郭平)c), Gao Ji-Kai(高继开)a), Du Gong-He(杜恭贺)a), and Wen Zhen-Yi(文振翼)d)
摘要: This paper computationally investigates the RhSi$_{n}(n=1$--$6)$ clusters by using a density functional approach. Geometry optimizations of the RhSi$_{n}(n=1$--$6)$ clusters are carried out at the B3LYP level employing LanL2DZ basis sets. It presents and discusses the equilibrium geometries of the RhSi$_{n}(n=1$--$6)$ clusters as well as the corresponding averaged binding energies, fragmentation energies, natural populations, magnetic properties, and the energy gaps between the highest occupied molecular orbital and the lowest unoccupied molecular orbital. Theoretical results show that the most stable RhSi$_{n}(n=1$--$6)$ isomers keep an analogous framework of the corresponding Si$_{n + 1 }$ clusters, the RhSi$_{3}$ is the most stable cluster in RhSi$_{n}(n=1$--$6)$ isomers. Furthermore, the charges of the lowest-energy RhSi$_{n}(n=1$--$6)$ clusters transfer mainly from Si atom to Rh atom. Meanwhile, the magnetic moments of the RhSi$_{n}(n=1$--$6)$ arises from the 4d orbits of Rh atom. Finally, compared with the Si$_{n+1}$ cluster, the chemical stability RhSi$_{n}$ clusters are universally improved.
中图分类号: (Spectroscopy and geometrical structure of clusters)