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Quantum theory of dielectric relaxation in polar solids
Author(s) -
Georgiev M.,
Gochev A.,
DiazGongora A.
Publication year - 1986
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560290531
Subject(s) - polar , relaxation (psychology) , impurity , chemistry , dipole , dielectric , quantum tunnelling , ionic bonding , condensed matter physics , halide , electron , chemical polarity , coupling (piping) , chemical physics , quantum , alkali metal , phonon , molecular physics , materials science , physics , ion , quantum mechanics , inorganic chemistry , psychology , social psychology , organic chemistry , metallurgy
A novel approach to the impurity dipole relaxation in polar solids is described in which the dipole reorientational sites are formed by an appropriate electron—phonon coupling interaction. The electronic states used for a two‐site formulation are defined as ones pertaining to the impurity and/or the associated intrinsic point defect. The theory takes into account the adiabaticity of the electron transfer in addition to the barrier‐controlled ionic tunneling. It compares favorably with available experimental relaxation‐time data on alkali halides.