TY - JOUR
T1 - The extra branch of ARUPS spectra and the atomic structure of the Si(100) surface
AU - Inoue, K.
AU - Nakayama, M.
AU - Kawai, H.
N1 - Funding Information:
The authors thank Professor S. Kono for useful discussions and for informing them about recent experiments. This work is supported in part by the Grant-in-Aid for Scientific Research on Priority Area from the Ministry of Education, Science, and Culture of Japan.
PY - 1991/2/1
Y1 - 1991/2/1
N2 - The intensity of the two branches, which were observed in a recent ARUPS experiment on a single domain Si(100)c(4 × 2) surface, is studied by the tight-binding method for the ensemble of the surface buckled dimers. The calculated ARUPS intensity of the branch corresponding to the extra branch observed on a 2 × 1 surface at room temperature vanishes on the Γ-J' axis for the conventional c(4 × 2) structure because of its symmetry. The ARUPS intensity is investigated in the cases where displacements of the surface atoms from the conventional structure are introduced holding c(4 × 2) lattice symmetry. A sizable amount of the intensity is obtained only when the dimer as a whole is displaced up and down alternately along the row. A model of the dimer structure is proposed to explain the qualitative feature of the observed intensity.
AB - The intensity of the two branches, which were observed in a recent ARUPS experiment on a single domain Si(100)c(4 × 2) surface, is studied by the tight-binding method for the ensemble of the surface buckled dimers. The calculated ARUPS intensity of the branch corresponding to the extra branch observed on a 2 × 1 surface at room temperature vanishes on the Γ-J' axis for the conventional c(4 × 2) structure because of its symmetry. The ARUPS intensity is investigated in the cases where displacements of the surface atoms from the conventional structure are introduced holding c(4 × 2) lattice symmetry. A sizable amount of the intensity is obtained only when the dimer as a whole is displaced up and down alternately along the row. A model of the dimer structure is proposed to explain the qualitative feature of the observed intensity.
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U2 - 10.1016/0039-6028(91)90274-V
DO - 10.1016/0039-6028(91)90274-V
M3 - Article
AN - SCOPUS:0026104982
SN - 0039-6028
VL - 242
SP - 244
EP - 249
JO - Surface Science
JF - Surface Science
IS - 1-3
ER -