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Exciton States of Lithium Hydride in LiH 1− x F x Solid Solutions
Author(s) -
Polienko A. N.,
Tabachnik M. E.,
Cholakh S. O.,
O'Connelbronin A. A.
Publication year - 1993
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.2221790216
Subject(s) - lithium hydride , exciton , lithium (medication) , hydride , spectral line , chemistry , luminescence , electronic band structure , condensed matter physics , solid solution , symmetry (geometry) , materials science , atomic physics , ion , physics , ionic bonding , hydrogen , quantum mechanics , optoelectronics , medicine , geometry , organic chemistry , mathematics , endocrinology
Exciton states of LiH 1− x F x in the exciton band of lithium hydride are investigated by optical methods. It was found that spectra of the lowest‐energy exciton band of these crystals follow the persistent type of behaviour. The relation of exciton energy to solution composition points to the effect of symmetry changes of the conduction band bottom and average sizes of lithium hydride clusters. The structure of the luminescence spectra is determined by direct, phonon‐forbidden indirect, or disorder‐assisted quasidirect transitions with increasing fluorine content.