Open AccessTHE Cs/C(0001)-(2×2) SURFACE STRUCTURE ANALYSIS BY LEED DYNAMICAL CALCULATION
Author(s) -
胡兹莆,
李嘉,
伍乃娟
Publication year - 1988
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.37.2068
Subject(s) - graphite , materials science , intercalation (chemistry) , structure factor , surface (topology) , adsorption , substrate (aquarium) , surface structure , crystallography , position (finance) , physics , chemistry , geometry , composite material , quantum mechanics , mathematics , oceanography , finance , economics , geology
The I-V curves of a series of possible models of Cs/C(0001)—(2×2) surface are calculated by dynamical LEED theory with RSP and RFS methods. The dalculated curves are selected with experimental results and the best structure is chosen by R-factor calculation. The model of Cs intercalating graphite layers forming intercalate structure and the model of Cs atoms adsorbed on top position of graphite surface are ruled out by R-factor examination. The most probable structure is that Cs atoms adsorbed on hollow position of graphite layer with a interlayer distance of 2.80 ? between Cs laver and graphite, and substrate has the same, structure as that of graphite bulk structure.