Metallic films on the MgO OOl surface

There are few reported calculations involving metallic overlayers deposited on MgO(OOl),121-124 with the work of Goniakowski106 on the second row 

3 Interaction of metal atoms with point defects of the MgO(OOl) surface 

Even the cleanest of all the substrates shows areas where the periodic surface potential is perturbed. These sites can be generally called defects. Defects are generally classified into two main subclasses point defects, like corners, kinks, impurities or missing atoms and extended defects, like dislocations and steps. The type, concentration and characteristics of defects depend on several factors but the nature of the oxide and the history of the sample are no doubt the most important ones. In this section, two of the most commonly found MgO defects21,126 — low coordinated anion sites (steps and corners) and oxygen vacancies — will be considered with special emphasis on their interaction with metal atoms. 

Oxygen vacancies in oxides have long been known. These defects are traditionally known as colour or F centres because of the characteristic 

The rofe of point defects in the interaction of metais with the defective MgO(OOl) surface has been investigated in detaii in the case of Pd atoms.137 ft has been found that for Pd interacting with an anion but at low coordinated sites (steps a corners) the binding energy of a Pd atom 

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