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Polarization Investigations of Localized Exciton States of Doped Benzene Crystals
Author(s) -
Ostapenko I. N.,
Shpak M. T.
Publication year - 1969
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.19690310212
Subject(s) - exciton , polarization (electrochemistry) , doping , absorption spectroscopy , molecular physics , absorption (acoustics) , absorption edge , spectral line , materials science , biexciton , condensed matter physics , benzene , chemistry , band gap , optics , optoelectronics , physics , quantum mechanics , organic chemistry , composite material
The absorption spectra of localized exciton states of benzene crystals doped with heterocyclic compounds are studied at T = 4.2 °K using polarized light. When the localized level approaches the exciton A‐band edge, the intensity of the localized absorption is shown to increase anomalously in the a ‐component and to decrease in the c ‐component of the absorption spectrum. Simultaneously the A‐band is partly depolarized and shifts towards the violet side. The experimental results obtained favour certain conclusions about the exciton band structure and the exciton effective mass and are qualitatively interpreted on the basis of current theories of localized states.