ADSORPTION OF MGO ON MO(110)

Adsorption of MgO on Mo(110) is studied by means of AES, LEED, EELS, a nd work function measurements. It is found that there is a reduction o f the value of intramolecular bonding charge of adsorbed MgO molecules in the submonolayer region. This value for a single adsorbed molecule is 1.0 (in e-units), i.e. by about 40% less than in the bulk MgO crys tal (1.6). During adsorption a substantial change of the shape of the current-voltage curve in Anderson's method, due to the dielectric prop erties of the adsorbate, occurs. Concentration dependences of work fun ction and reflection coefficient of low energy electrons are obtained. Data about the growth mode and superstructures are presented.