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One‐Phonon Relaxation of Hydroxyl Ions in Alkali Halide Crystals
Author(s) -
Dick B. G.
Publication year - 1968
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.19680290208
Subject(s) - halide , phonon , alkali metal , relaxation (psychology) , quantum tunnelling , ion , crystal (programming language) , dipole , chemistry , dielectric , condensed matter physics , matrix (chemical analysis) , resonance (particle physics) , activation energy , materials science , inorganic chemistry , atomic physics , physics , social psychology , psychology , optoelectronics , organic chemistry , chromatography , computer science , programming language
An expression is derived for transition rates of OH − dipole orientation in alkali halides due to one‐phonon assisted tunneling. This rate is expressed in terms of host crystal constants, a stress energy splitting parameter, and a tunneling matrix element. Comparison of calculated and observed relaxation rates for KCl implies that the tunneling matrix element deduced from the one‐phonon relaxation time is about an order of magnitude smaller than that deduced from recent paraelectric resonance experiments.