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Influence of Planar Defects and Disorder on the Energy Spectrum of Molecular Crystals
Author(s) -
Primatarowa M. T.
Publication year - 1984
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.2221210138
Subject(s) - exciton , randomness , planar , crystal (programming language) , energy spectrum , condensed matter physics , spectrum (functional analysis) , density of states , molecular physics , energy (signal processing) , physics , materials science , quantum mechanics , mathematics , statistics , computer graphics (images) , computer science , programming language
Using the Green function approach the exciton spectrum of a molecular crystal containing planar defects is investigated. The system is presented in the nearest‐neighbour Heitler‐London approximation. The condition for the appearance of localized and quasilocalized states is obtained and the exciton energy is determined in a linear approximation in the defect concentration. Expressions are given for the density of states in some particular cases. Further, the energy spectrum of a disordered molecular crystal of a layer type is considered and the effect of the randomness of the interaction between the layers on the density of states is discussed.