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Role of preferential weak hybridization between the surface-state of a metal and the oxygen atom in the chemical adsorption mechanism

MPG-Autoren
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Walter,  Andrew L.
Advanced Light Source, Lawrence Berkeley National Laboratory;
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Zitation

Kim, Y. S., Jeon, S. H., Bostwick, A., Rotenberg, E., Ross, P. N., Walter, A. L., et al. (2013). Role of preferential weak hybridization between the surface-state of a metal and the oxygen atom in the chemical adsorption mechanism. Physical Chemistry Chemical Physics, 15(43), 19019-19023. doi:10.1039/C3CP53376J.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0014-BC6D-0
Zusammenfassung
We report on the chemical adsorption mechanism of atomic oxygen on the Pt(111) surface using angle-resolved-photoemission spectroscopy (ARPES) and density functional calculations. The detailed band structure of Pt(111) from ARPES reveals that most of the bands near the Fermi level are surface-states. By comparing band maps of Pt and O/Pt, we identify that dxz (dyz) and dz2 orbitals are strongly correlated in the surface-states around the symmetry point M and K, respectively. Additionally, we demonstrate that the s- or p-orbital of oxygen atoms hybridizes preferentially with the dxz (dyz) orbital near the M symmetry point. This weak hybridization occurs with minimal charge transfer.