Abstract
Formulae for calculation of the local modes and of the Green function of defect lattices can be simplified if the matrix characterising the defect is singular. From this point of view are investigated vibrations of an ionic crystal containing a substitutional defect the charge of which is equal to the charge of the substituted ion.
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I am deeply indebted to Prof. Dr. O.Litzmann for suggesting this work and for many helpful discussions. I should also like to thank Dr. M.Bartušek for performing machine computations.
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Lacina, A. Vibration of ionic crystals containing substitutional defects in the shell model. Czech J Phys 24, 284–292 (1974). https://doi.org/10.1007/BF01596349
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DOI: https://doi.org/10.1007/BF01596349