Premium
V K Centres in Alkali Halides. Direct Spin‐Lattice Relaxation and Electron‐Phonon Interaction
Author(s) -
Stolovich A.,
Liidja G.
Publication year - 1989
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.2221510104
Subject(s) - halide , anisotropy , lattice vibration , alkali metal , chemistry , phonon , condensed matter physics , electron , ion , lattice (music) , relaxation (psychology) , vibration , lattice constant , spin–lattice relaxation , physics , diffraction , inorganic chemistry , quantum mechanics , paramagnetism , organic chemistry , social psychology , psychology , acoustics
Abstract Recent experimental results on the anisotropy of the Kronig Van Vleck one‐phonon spin‐lattice relaxation rates of self‐trapped hole centres in KBr, RbBr, and KI are used to obtain electron‐vibration interaction constants for even non‐totally symetric vibrations of V K centres. A simple centre model, consisting of the X 2 −molecule and two nearest cations with normal vibrations of β1g, β2g, and β3g symmetry, is used. A qualitative agreement with the experimental data on various cations and anions can be obtained when ion size corrections are taken into account in evaluating electron‐vibration matrix elements.