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|Title:||Low-energy electron diffraction study of oxygen-induced reconstructions on Cu(210)|
|Authors:||Guo, Y.P. |
|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  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  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|
|Appears in Collections:||Staff Publications|
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