Phonon self-energy in LiTaO3and LiNbO3

1 May 1977

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 15 (9) , 4532-4536
https://doi.org/10.1103/physrevb.15.4532

Abstract

Infrared reflection spectra (extraordinary ray) of lithium niobate and lithium tantalate in the temperature range 300-1300 K exhibit a feature which cannot be described correctly with an additional classical oscillator and which is understood as a phonon self-energy effect. Comparison is made with room-temperature Raman data where two additional peaks in the same spectral region have been assigned to a fundamental polar phonon mode activated by a distortion of the structure.

Keywords

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