Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/97102
Title: Low-energy electron diffraction study of oxygen-induced reconstructions on Cu(210)
Authors: Guo, Y.P. 
Tan, K.C.
Wang, H.Q. 
Huan, C.H.A. 
Wee, A.T.S. 
Issue Date: 15-Oct-2002
Source: Guo, Y.P.,Tan, K.C.,Wang, H.Q.,Huan, C.H.A.,Wee, A.T.S. (2002-10-15). Low-energy electron diffraction study of oxygen-induced reconstructions on Cu(210). Physical Review B - Condensed Matter and Materials Physics 66 (16) : 1654101-1654108. ScholarBank@NUS Repository.
Abstract: The oxygen-induced reconstructions on Cu(210) have been investigated by low-energy electron diffraction (LEED). The adsorption of oxygen on Cu(210) leads to a series of (n × 1) (n= 2,3) reconstructions comprising Cu-O chains along the [001] direction on the topmost layer. The Cu(210)-(2 × 1)O structure is found to be the most thermodynamically favorable phase. A quantitative LEED analysis, performed by comparing the simulation results of different 2 × 1 and 3 × 1 models, confirms an added row model with oxygen sitting on the long bridge sites along the [001] direction. The oxygen atoms sit in a deeper position from the surface than the topmost Cu atoms, and the Cu-O rows relax upward. In the Cu(210)- (3 × 1)O structure with an oxygen coverage of 2/3 ML, oxygen atoms reside deeper than the accompanying Cu atoms in one Cu-O row, while in the adjacent row, oxygen sits higher than the Cu atoms. The nearest and second nearest neighbor Cu-O distances are determined to be 1.82±0.03 and 1.96±0.06 Å respectively for both 2 × 1 and 3 × 1 reconstructions. The formation of relatively strong Cu-O bonds appears to be the driving force for both reconstructions.
Source Title: Physical Review B - Condensed Matter and Materials Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/97102
ISSN: 01631829
Appears in Collections:Staff Publications

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