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Optical Absorption and Stability of the Bipolaron Lattice
Author(s) -
Puff H.,
Streitwolf H. W.
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.2221500119
Subject(s) - bipolaron , polaron , polythiophene , lattice (music) , condensed matter physics , conductivity , optical lattice , materials science , optical conductivity , chemistry , electron , physics , conductive polymer , quantum mechanics , electrode , acoustics , superfluidity
The polaron lattice solution of the Brazovskii‐Kirova model is derived in the continuum approximation. The stability of the bipolaron lattice phase of this solution as well as the nature of the transition to the dimerized C‐phase are discussed. The optical conductivity is calculated for different excess electron densities and the optical sum rule is verified in each case. Finally a comparison with experimental results for polypyrrole, polythiophene, and its alkyl‐derivatives is made.