@article {4655,
	title = {Tensor LEED analysis for the Cu(111)-(root x root 7)R19.1 degrees-S surface structure},
	journal = {Surface Science},
	volume = {441},
	number = {2-3},
	year = {1999},
	note = {ISI Document Delivery No.: 253RWTimes Cited: 11Cited Reference Count: 36},
	month = {Nov},
	pages = {425-435},
	type = {Article},
	abstract = {A tensor LEED analysis is reported for the (root 7 x root 7)R19.1 degrees structure formed by S at the Cu(lll)surface. A new structural model is found which corresponds to a modified version of the copper sulphide overlayer model first proposed by Domange and Oudar. In that model, the topmost layer has 3/7 monolayer each of Cu and S atoms, but the modification involves one S atom per unit mesh moving down to displace a Cu atom from the second metal layer. Relaxations among the topmost Cu atoms result in one S atom being effectively three-fold coordinate while the other two are sixfold coordinate and 12-fold coordinate: the averaged S-Cu bond lengths are indicated to equal 2.19, 2.47 and 2.62 Angstrom respectively. Some discussion is included of factors that may influence this choice of surface structure. (C) 1999 Elsevier Science B.V. All rights reserved.},
	keywords = {ADSORPTION, chemisorption, copper, ENERGY-ELECTRON-DIFFRACTION, LAYERS, low energy electron diffraction, LOW INDEX SINGLE CRYSTAL, METAL-SURFACES, MOLECULE, RAY STANDING-WAVE, RECONSTRUCTION, RU(0001), SUBSTRATE, SULFUR, sulphur, SURFACE, surface reconstruction},
	isbn = {0039-6028},
	url = {<Go to ISI>://000083570400024},
	author = {Saidy, M. and Mitchell, K. A. R.}
}
@article {3546,
	title = {LEED ANALYSES REVISITED FOR 2 STRUCTURES FORMED BY ZR(0001) - THE SURFACE WHEN CLEAN AND WHEN CONTAINING SUFFICIENT OXYGEN TO JUST EXTINGUISH THE HALF-ORDER BEAMS},
	journal = {Surface Science},
	volume = {343},
	number = {1-2},
	year = {1995},
	note = {ISI Document Delivery No.: TK128Times Cited: 26Cited Reference Count: 22},
	month = {Dec},
	pages = {L1167-L1173},
	type = {Letter},
	abstract = {LEED crystallographic analyses have been made for two structures formed by the (0001) surface of zirconium and which show (1 x 1)-type diffraction patterns. An analysis with eight diffracted beams for clean Zr(0001) supports an earlier conclusion that this surface has a regular hcp-type structure, and that the first interlayer spacing shows a contraction hem the bulk spacing by about 1.6\%. A surface formed by O, at twice the coverage applying for the best-developed half-monolayer (2x2) diffraction pattern, is analyzed using tensor LEED for nine diffracted beams, including the use of the average t-matrix approximation. It is concluded that the 1 monolayer (ML) structure is actually disordered with 0.5 ML of O distributed statistically over octahedral holes between the first and second Zr layers, and another 0.5 ML of O similarily distributed between the second and third metal layers.},
	keywords = {CRYSTALLOGRAPHIC INVESTIGATIONS, ENERGY-ELECTRON-DIFFRACTION, LOW ENERGY ELECTRON DIFFRACTION (LEED), LOW INDEX SINGLE CRYSTAL, OXYGEN, SANDWICH, SURFACE RELAXATION AND RECONSTRUCTION, SURFACES, ZIRCONIUM},
	isbn = {0039-6028},
	url = {<Go to ISI>://A1995TK12800004},
	author = {Wang, Y. M. and Li, Y. S. and Mitchell, K. A. R.}
}
@article {3547,
	title = {A LEED CRYSTALLOGRAPHIC ANALYSIS FOR THE HALF MONOLAYER STRUCTURE FORMED BY O AT THE ZR(0001) SURFACE},
	journal = {Surface Science},
	volume = {342},
	number = {1-3},
	year = {1995},
	note = {ISI Document Delivery No.: TH886Times Cited: 32Cited Reference Count: 35},
	month = {Nov},
	pages = {272-280},
	type = {Article},
	abstract = {A tensor LEED analysis has been made for the half monolayer structure formed by O absorbed at the Zr(0001) surface. The analysis uses intensity-versus-energy curves for eight independent diffracted beams measured at normal incidence. The best correspondence with the experimental intensity data is for a model in which O atoms occupy octahedral holes in an unreconstructed metallic structure, with 0.25 ML between the first and second metal layers, and another 0.25 ML between the second and third metal layers. These two (2 X 2)-O arrays are displaced laterally from one another by an unit translational vector of the Zr(0001) substrate. The O atoms induce both vertical and lateral relaxations in the three topmost Zr layers; the largest displacements being found in the second Zr layer. The averaged O-Zr bond length is 2.28 Angstrom, about 0.02 Angstrom shorter than the value in bulk ZrO.},
	keywords = {0001 SURFACE, 2)-O, ALPHA-AL2O3, chemisorption, ENERGY-ELECTRON-DIFFRACTION, INDUCED RECONSTRUCTION, LOW ENERGY ELECTRON DIFFRACTION (LEED), LOW INDEX SINGLE CRYSTAL, OXIDATION, OXYGEN, SURFACE RELAXATION, SURFACES, X, ZIRCONIUM},
	isbn = {0039-6028},
	url = {<Go to ISI>://A1995TH88600034},
	author = {Wang, Y. M. and Li, Y. S. and Mitchell, K. A. R.}
}
