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Dipole Polarizability of O 2− Ions near the (011) and the (111) Surface of Alkaline Earth Oxides
Author(s) -
Kassim H. A.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221620127
Subject(s) - polarizability , dipole , ion , alkaline earth metal , surface (topology) , perturbation (astronomy) , chemistry , chemical physics , materials science , inorganic chemistry , geometry , physics , molecule , alkali metal , quantum mechanics , organic chemistry , mathematics
The effect of (011) and (111) surfaces on the dipole polarizability of O 2− ions in alkaline earth oxides is estimated by employing a variational perturbation method in the manner of Kirkwood, Pople, and Schofield. Initially the study concentrates on O 2− ions in the bulk and then moves gradually to surface sites. The reduced surface polarizability as compared with the bulk value is attributed to the variation in the crystalline medium when moving from the bulk to top layers. In all the cases, ideal surfaces are assumed. Modifications in these surface values due to surface reconstruction may be important but are not included in the present study due to the uncertainty in the actual surface geometry.