O-Cu(001) I Binding the Signatures of Leed, STM and PES in a Bond-Forming Way

Abstract

This work consists of two sequential parts, which review the advances in uncovering the capacity of VLEED, STM and PES in revealing the nature and kinetics of oxidation bonding and its consequences for the behavior of atoms and valence electrons at a surface; and in quantifying the O{Cu(001) bonding kinetics. The rst part describes the model in terms of bond making and its eect on the valence DOS and on the surface potential barrier (SPB) for surfaces with chemisorbed oxygen. One can replace the hydrogen in aH 2O molecule with an arbitrary less electronegative element and extend the M2 Ot o a solid surface with Goldschmidt contraction of the bond length, which formulates a specic oxidation surface with identication of atomic valences and their correspondence to the STM and PES signatures. As consequences of bond making, oxygen derives four additional DOS features in the valence band and above, i.e. O{M bonding ( 5 eV), oxygen nonbonding lone pairs ( 2e V), holes ( EF ), and antibonding metal dipoles ( EF ), in addition to the hydrogen-bond-like formation. The evolution of O 1 to O 2 transforms the CuO2 pairing o-centered pyramid in the c(2 2)-2O 1 into the Cu3O2 pairing tetrahedron in the (2 p 2 p 2)R45-2O 2 phase on the Cu(001) surface. The new decoding technique has enabled the model to be justied and hence the capacity of VLEED, PES and STM to be fully uncovered in determining simultaneously the bond geometry, the SPB, the valence DOS, and their interdependence.