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The optical properties of LiNbO 3
Author(s) -
Bärner K.,
Braunstein R.,
Weakliem H. A.
Publication year - 1975
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.2220680208
Subject(s) - conduction band , electron , density of states , valence (chemistry) , atomic electron transition , condensed matter physics , valence band , atomic physics , electronic band structure , reflectivity , materials science , chemistry , physics , optics , band gap , spectral line , quantum mechanics
The optical constants of LiNbO 3 from 0.3 to 14.5 eV are presented from a Kramers‐ Kronig analysis of the near normal incidence reflectivity spectrum. Comparison with the cubic perovskites suggests that the electronic transitions from 3.5 to 12 eV are between the O 2 ‐2p valence band and Nb 4+ d‐like conduction band states. Higher transitions are most likely into Li + 2s states. Sum rules are applied to calculate the effective number of electrons involved; this number is found to be consistent with the above assignment. Also, the combined density of states function is found to be very similar to that calculated for the analog compound KTaO 3 .