TY - JOUR
T1 - High energy transmission electron diffraction and imaging studies of the silicon (111) 7 × 7 surface structure
AU - Spence, John
N1 - Funding Information:
This work was supported by NSF Grant No. DMR8002108-03. Useful discussions with Drs. K. Yagi, K. Takayanagi, M. O’Keefe and L. Marks are gratefully acknowledged. This work was made possible by the support and hospitality of the Tokyo Institute of Technology group during a visit funded by the NSF US-Japan Scientific co-operation program.
PY - 1983
Y1 - 1983
N2 - Kilovolt electron scattering experiments in the transmission geometry offer certain advantages for surface structure analysis over more traditional techniques. These include the absence of electron exchange effects, the ability to analyze submicron regions, their compatibility with imaging (for the study of chemically important inhomogeneities) and the usefulness of the kinematic approximation for surface superlattice reflections. An experimental 100 kV transmission electron diffraction pattern from the silicon [111] 7 × 7 structure is analyzed and compared with the diffracted intensities expected from two recent models for the 7 × 7 adlayer. Shuffle and glide termination effects are discussed. Thousand-beam dynamical calculations of atomic resolution transmission electron images of the surface superlattice are used to show the high sensitivity of these to charge transfer effects, and the imaging conditions needed to maximize this sensitivity are determined.
AB - Kilovolt electron scattering experiments in the transmission geometry offer certain advantages for surface structure analysis over more traditional techniques. These include the absence of electron exchange effects, the ability to analyze submicron regions, their compatibility with imaging (for the study of chemically important inhomogeneities) and the usefulness of the kinematic approximation for surface superlattice reflections. An experimental 100 kV transmission electron diffraction pattern from the silicon [111] 7 × 7 structure is analyzed and compared with the diffracted intensities expected from two recent models for the 7 × 7 adlayer. Shuffle and glide termination effects are discussed. Thousand-beam dynamical calculations of atomic resolution transmission electron images of the surface superlattice are used to show the high sensitivity of these to charge transfer effects, and the imaging conditions needed to maximize this sensitivity are determined.
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U2 - 10.1016/0304-3991(83)90226-7
DO - 10.1016/0304-3991(83)90226-7
M3 - Article
AN - SCOPUS:0020899161
VL - 11
SP - 117
EP - 124
JO - Ultramicroscopy
JF - Ultramicroscopy
SN - 0304-3991
IS - 2-3
ER -