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A Cu(1 1 1)(√3 X √3)R30° -Sb structure by impact collision ion-scattering spectroscopy
K.Umezawa,H.Takaoka,S.Hirayama,S.Nakanishi,W.M.Gibson 한국물리학회 2003 Current Applied Physics Vol.3 No.1
We have investigated the structures of Cu(111)(p3 .p3)R30.-Sb using time of ight-impact collision ion-scattering spec-troscopy. The experimental data and computer simulations support a structural model for the Cu(111)(p3 .p3)R30.-Sb structurein which Sb atoms displace up to 1=3 of the rst layer of Cu atoms and incorporate them into the rst Cu layer with the Sb atomsdisplaced outward 0.40.A with respect to the rst-layer Cu atoms. The outermost rst layer of Sb and Cu atoms shift from fcc- tohcp-hollow sites (only the top layer of Sb and Cu atoms occupies hcp hollow sites).. 2002 Elsevier Science B.V. All rights reserved.