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Tensor LEED analysis for the Ni(111)–(√7 × √7)R19.1°–P surface structure: comparison with other √7 systems
Author(s) -
Saidy M.,
Zhou M. Y.,
Mitchell K. A. R.
Publication year - 1999
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/(sici)1096-9918(199908)28:1<84::aid-sia624>3.0.co;2-1
Subject(s) - crystallography , chemistry , low energy electron diffraction , monolayer , surface (topology) , surface reconstruction , surface structure , atom (system on chip) , electron diffraction , diffraction , geometry , physics , mathematics , optics , biochemistry , computer science , embedded system
A crystallographic analysis is reported using low‐energy electron diffraction (LEED) in the tensor LEED approach for the (√7 × √7)R19.1° structure formed by 3/7 monolayer of phosphorus at the Ni(111) surface. This surface has a novel structure in which each phosphorus atom bonds to seven neighbouring Ni atoms, four in the top layer and three in the second layer, at an average distance close to 2.39 Å. Formally this reconstruction involves three neighbouring Ni atoms in a triangular arrangement per unit mesh of the original unreconstructed surface being replaced by three phosphorus atoms. A discussion is included of the structural relaxations that occur in this surface as the demands of Ni–P bonding are balanced against those for Ni–Ni and P–P contributions. Comparisons are made with the √7 reconstructions observed for related systems, including those for P/Rh(111), S/Pd(111) and S/Cu(111). Copyright © 1999 John Wiley & Sons, Ltd.