OXYGEN-DERIVED DOS FEATURES IN THE VALENCE BAND OF METALS

Chang Q. Sun () and Shuanming Li
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Chang Q. Sun: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore

Surface Review and Letters (SRL), 2000, vol. 07, issue 03, 213-217

Abstract: From the perspective of sp orbital hybrid bonding and its consequence on the behavior of valence electrons, new insight is presented into the nature of oxygen-derived features in the valence band and above of metals. It is suggested that the crystal geometry and the surface morphology may vary from surface to surface and from material to material but the oxygen-derived features in energy space are substantially the same in nature. The derived features can be consistently specified as oxygen–metal bonding (-5 to -8 eV), a nonbond lone pair of oxygen (-1 to -2 eV), holes of metal ions(~EF)and antibonding metal dipole states(>EF), other than the addition of the 2s or 2p states of the isolated oxygen additives.

Date: 2000
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DOI: 10.1142/S0218625X00000312

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