Electronic structure of a hydrogen impurity near a (001) Pd surface
Physical Review B, ISSN: 0163-1829, Vol: 38, Issue: 17, Page: 12150-12155
1988
- 11Citations
- 4Captures
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Article Description
We discuss the adsorption and absorption of light impurities (H) near a transition-metal surface (Pd), within the framework of the electronic structure of interstitial impurities. We derive the band structure and total energy of the system H/Pd(001) in a tight-binding model, taking into account s,p,d orbitals of Pd. We obtain the relative stability of the various sites (tetrahedral and octahedral sites), relative to their position to the surface, from adsorption to absorption. The bridge geometry is found to be the stablest adsorption site with an energy in agreement with experiment. Some subsurface sites are also very stable ones. The coupling strength between the 1s orbital of hydrogen to the 5s orbital of Pd is an essential parameter. We argue that the interactions between H atoms, even at small finite concentration, can qualitatively alter the results obtained in the infinitely dilute impurity result. © 1988 The American Physical Society.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=4244088600&origin=inward; http://dx.doi.org/10.1103/physrevb.38.12150; http://www.ncbi.nlm.nih.gov/pubmed/9946151; https://link.aps.org/doi/10.1103/PhysRevB.38.12150; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.38.12150/fulltext; http://link.aps.org/article/10.1103/PhysRevB.38.12150
American Physical Society (APS)
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