Analysis of the peak position and linewidth as a function of temperature for the phase transitions in LiKSO4
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Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
World Scientific Publ Co Pte Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Analysis of the peak position and the linewidths of various infrared modes is performed at high (300-850 K) and low (1.5-300 K) temperatures using the experimental data from the literature for LiKSO4 which exhibits a sequence of phase transitions. The temperature dependences of the frequency and the linewidth which are derived from the anharmonic self-energy are fitted to the observed peak positions and the linewidths of the S-O stretching modes (internal nu(3) modes at 1135 cm(-1) and at 1180 cm(-1)), peak position of the S-O bending nu(4) (internal) modes, the peak position and the linewidth of the Li mode at 429 cm(-1) (external mode), and of the infrared band at 363 cm(-1) for LiKSO4. Our calculated peak positions and the linewidths, which are in good agreement with the observed data show that the anharmonic self-energy model describes adequately the observed behavior of the successive phase transitions in LiKSO4.
Açıklama
Anahtar Kelimeler
Peak position, linewidth, infrared modes, LiKSO4
Kaynak
Modern Physics Letters B
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
30
Sayı
5
