Structure and bonding nature of C-60/Si(100)-c(4x4): Density-functional theory calculations
SCIE
SCOPUS
- Title
- Structure and bonding nature of C-60/Si(100)-c(4x4): Density-functional theory calculations
- Authors
- Lee, JY; Kang, MH
- Date Issued
- 2007-03
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- We have studied the adsorption structure and bonding nature of the C-60/Si(100)-c(4x4) surface using density-functional theory calculations. Based on energetics and scanning-tunneling-microscopy simulations, we propose a structural model where C-60 adsorbs in between Si dimer rows with a C-C bond shared by two hexagon faces headed down and aligned perpendicular to Si dimer rows. This structure shows a semiconducting band structure, and the modified occupied and unoccupied molecular-orbital levels are resolved. Our charge character analysis figures out the bonding nature as covalent by the evidence of C-Si sigma bond formations. The calculated surface density of states, well reflecting the modified molecular levels, explains well the position and origin of the peaks measured by photoelectron spectroscopy study.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12178
- DOI
- 10.1103/PhysRevB.75.125305
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 75, no. 12, page. 125305 - 125305, 2007-03
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