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SSL Seminar Series 2001 No. 13
Combined talks (two speakers) on LEED and XPD study on 6H-SIC(0001)
reconstruction surfaces
Time: August 2, 2001, 5:00-6:00pm
Venue: Physics Resource Room, S13, 02-16
Title: LEED and XPD study on 6H-SiC (0001) reconstruction surfaces
Speakers: Wang Huiqiong, Zheng Jincheng (SSL, NUS)
Abstract
Low Energy Electron Diffraction (LEED) and X-ray Photoelectron Diffraction
(XPD) both serve as good techniques for surface investigation. The
former is powerful on the study of long-order periodic surface structures,
whist the later takes the advantage of the research on short-order
periodic surface properties. In our work, the surface reconstructions
of 3x3, 3x3/2x2, sqrt(3)xsqrt(3)R30° and 6sqrt(3) x 6sqrt(3)R30° as
well as some “intermediated states” have been observed on 6H-SiC(0001)
surface by LEED experiments, while the 3x3 surface has also been comparatively
investigated by XPD. The interpretation of these results aims as the
complement of the RHEED analysis by Xie XN et al and the STM study
by Ong WJ et al, for both of which, the 6x6 reconstruction was obtained
and modeled |
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