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On the temperature dependence of the optical absorption edge in nickel oxide
Author(s) -
Pattanayak J.,
Becker K. D.
Publication year - 1995
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.2221880227
Subject(s) - non blocking i/o , absorption edge , absorption (acoustics) , nickel oxide , condensed matter physics , materials science , enhanced data rates for gsm evolution , lattice (music) , oxygen , exciton , photon energy , nickel , oxide , molecular physics , photon , chemistry , physics , optics , band gap , metallurgy , biochemistry , organic chemistry , acoustics , catalysis , telecommunications , computer science , composite material
Results are reported of a high‐temperature investigation (up to 1000 °C) of the optical absorption edge in NiO. An approximately exponential dependence of the absorption coeficient on photon energy is observed. The absorption coeficient is found to be independent of oxygen partial pressure, i.e., of native lattice defects. The temperature dependence of the edge gives evidence of strong exciton‐phonon coupling in NiO.