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Optical Properties of Quasi‐1D n ‐Merized Molecular Semiconductors
Author(s) -
Yartsev V. M.
Publication year - 1988
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.2221490117
Subject(s) - eigenvalues and eigenvectors , semiconductor , coulomb , physics , electron , limiting , excitation , conductivity , optical conductivity , supercluster (genetic) , condensed matter physics , coupling (piping) , quantum mechanics , chemistry , materials science , gene , mechanical engineering , biochemistry , phylogenetics , engineering , metallurgy
Interacting dimers and trimers in quasi‐one‐dimensional organic semiconductors are modelled by a linear supercluster of six molecules. The general expression for the complex frequency‐dependent conductivity of the compounds composed from such superclusters is derived and the electron coupling to the totally symmetric intrameolcular modes of vibration is taken into account. Electron eigenstates and eigenvalues of the supercluster are calculated in terms of Hubbard model in the limiting case of infinite Coulomb repulsion ( U → ∞). Explicit calculations of the real part of the complex conductivity predict the shift of electronic excitation band to the lower energy as the interaction between dimers or trimers increase.