The atomic structure of the cleaved Si(111)-(2x1) surface refined by dynamical LEEDPhysical Review B (2004)
Several alternative models have been proposed for the much-studied Si(1111)-(2X1) surface structure, including: A reverse-tilted p-bonded chain model [Zitzlsperger et al. Surf. Sci 377, 108 (1997)]; a threebond scission model [by Haneman, Phys. Rev. 121, 1093 (1961)]; and a π-bonded chain model with enhanced vibrations (present work). These models are compared here to the generally accepted modified pbonded chain model [Himpsel et al., Phys. Rev. B. 30, 2257 (1984)], by analyzing low-energy electron
diffraction (LEED) intensity–voltage curves measured earlier. Using the efficient automated tensor LEED technique, the models can be refined to a much greater degree than with earlier methods of LEED analysis. This study distinctly favors the earlier modified π-bonded chain model, but with strongly enhanced vibrations. To compare models that have different numbers of adjustable free parameters, a Hamilton ratio test is used: It can distinguish between improvement due to a better model and improvement due only to more parameters.
Publication DateJuly, 2004
Citation InformationGeng Xu, Bingcheng Deng, Zhaoxian Yu, S.Y. Tong, et al.. "The atomic structure of the cleaved Si(111)-(2x1) surface refined by dynamical LEED" Physical Review B Vol. 70 Iss. 4 (2004) p. 045307-1 - 045307-7 ISSN: 24699969
Available at: http://works.bepress.com/mavanhove/74/