Open AccessINVESTIGATION OF THE ATOMIC STRUCTURE OF SURFACES BY MEANS OF FORWARD SCATTERING OF MEDIUM ENERGY ELECTRONS
Author(s) -
Zhou Xu-Bin,
Ji Hang,
Xiaowei Li,
Zhao Ru-Guang,
Weiping Yang
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.1535
Subject(s) - scattering , electron , surface (topology) , stacking , materials science , symmetry (geometry) , atomic physics , molecular physics , physics , optics , geometry , nuclear magnetic resonance , quantum mechanics , mathematics
The atomic structure of several surfaces has been investigated on the basis of the real space patterns formed by forward scattering of medium energy electrons from the surface.The images of the Cu(111) surface show not only that the surface has the three fold symmetry but also that the fcc stacking sequence persists up to the topmost atomic layer.The images of the Si(111)(31/2×31/2)R30°-In surface support that In atoms occupy the T4 sites on the surface,rather than the H3 sites.In the case of Ge(111)(31/2×31/2)R30°-Ag surface the images indicate that the honeycomb chained triangle (HCT) model is correct.The success of these applications shows that reliable structural information of surfaces can be obtained quite straightforward by means of forward scattering of medium energy electrons,instead of via complicated calculations such as involved in LEED crystallography.