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Chin. Phys. B, 2014, Vol. 23(1): 013601    DOI: 10.1088/1674-1056/23/1/013601
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Structure, stability and electronic properties of SrSin (n=1–12) clusters:Density-functional theory investigation

Zhang Shuai (张帅), Qin Yi (秦怡), Ma Mao-Fen (马毛粉), Lu Cheng (卢成), Li Gen-Quan (李根全)
Physics & Electronic Engineering College, Nanyang Normal University, Nanyang 473061, China
Abstract  Geometric structures, stabilities, and electronic properties of SrSin (n=1–12) clusters have been investigated using the density-functional theory within the generalized gradient approximation. The optimized geometries indicate that one Si atom capped on SrSin-1 structure and Sr atom capped Sin structure for difference SrSin clusters in size are two dominant growth patterns. The calculated average binding energy, fragmentation energy, second-order energy difference, the highest occupied molecular orbital, and the lowest unoccupied molecular orbital (HOMO–LUMO) gaps show that the doping of Sr atom can enhance the chemical activity of the silicon framework. The relative stability of SrSi9 is the strongest among the SrSin clusters. According to the mulliken population and natural population analysis, it is found that the charge in SrSin clusters transfer from Sr atom to the Sin host. In addition, the vertical ionization potential, vertical electron affinity, and chemical hardness are also discussed and compared.
Keywords:  SrSin clusters      ground state structure      stability      electronic properties  
Received:  17 April 2013      Revised:  27 June 2013      Accepted manuscript online: 
PACS:  36.40.-c (Atomic and molecular clusters)  
  36.40.Qv (Stability and fragmentation of clusters)  
  71.15.Mb (Density functional theory, local density approximation, gradient and other corrections)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11304167 and 51374132), the Postdoctoral Science Foundation of China (Grant No. 20110491317), the Natural Science Foundation of Henan Province, China (Grant Nos. 2011B140015 and 132300410290), and the Young Core Instructor Foundation of Henan Province, China (Grant No. 2012GGJS-152).
Corresponding Authors:  Lu Cheng     E-mail:  lucheng@nynu.edu.cn

Cite this article: 

Zhang Shuai (张帅), Qin Yi (秦怡), Ma Mao-Fen (马毛粉), Lu Cheng (卢成), Li Gen-Quan (李根全) Structure, stability and electronic properties of SrSin (n=1–12) clusters:Density-functional theory investigation 2014 Chin. Phys. B 23 013601

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