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Could the Oxygen Vacancy in Oxides of the Perovskite Family Be a Dipole Center?
Author(s) -
Prosandeyev S. A.,
Osipenko I. A.
Publication year - 1995
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.2221920105
Subject(s) - dipole , atomic orbital , perovskite (structure) , polarization (electrochemistry) , condensed matter physics , dielectric , electron , center (category theory) , lattice (music) , oxygen , vacancy defect , materials science , chemistry , crystallography , physics , quantum mechanics , optoelectronics , acoustics
The lattice polarization in oxides of the perovskite family is demonstrated to give rise to symmetry breaking of one‐electron orbitals at F centers. This can provide an explanation of recent experiments on paraelectric KTaO 3 where, by the second harmonic generation method, approximately 10 18 cm −3 dipole centers were found, the concentration of which depends on reduction and oxidation processes.