TY - JOUR
T1 - Spectroscopic valuation of phonon lifetime and surface characteristics of Zn0.96Mg0.04S thin film
AU - Krishna V S, Ganesha
AU - Mahesha, M. G.
N1 - Funding Information:
Ganesha Krishna V S acknowledges the Department of Science and Technology (DST), India, INSPIRE, for providing fellowship (Grant No. IF190268). The authors would like to thank the Manipal Academy of Higher Education Manipal for funding the characterization facilities.
Publisher Copyright:
© 2022 Author(s).
PY - 2022/7/7
Y1 - 2022/7/7
N2 - The anharmonic properties of the longitudinal optical (LO) phonon mode of Mg-doped ZnS (Zn0.96 Mg0.04S) are investigated using the Balkanski and Klemens models on the temperature-dependent Raman spectra. The variation in the position of the Raman line, peak width, and phonon lifetime with temperature was fitted using three and four phonon decay mechanisms. The values of the anharmonic fitting parameters indicated low anharmonicity. A lifetime of ∼0.17 ps at 90 K indicated a fast phonon decay. In addition, the thin film is analyzed to evaluate its surface characteristics using Raman mapping that showed chemical homogeneity over a large area of the film. Furthermore, we analyzed spatial variations of Raman line intensity, peak area, linewidth, and line position of the LO phonon mode. Raman analysis helped in understanding the phonon-phonon interaction mechanism in Zn0.96 Mg0.04S thin films.
AB - The anharmonic properties of the longitudinal optical (LO) phonon mode of Mg-doped ZnS (Zn0.96 Mg0.04S) are investigated using the Balkanski and Klemens models on the temperature-dependent Raman spectra. The variation in the position of the Raman line, peak width, and phonon lifetime with temperature was fitted using three and four phonon decay mechanisms. The values of the anharmonic fitting parameters indicated low anharmonicity. A lifetime of ∼0.17 ps at 90 K indicated a fast phonon decay. In addition, the thin film is analyzed to evaluate its surface characteristics using Raman mapping that showed chemical homogeneity over a large area of the film. Furthermore, we analyzed spatial variations of Raman line intensity, peak area, linewidth, and line position of the LO phonon mode. Raman analysis helped in understanding the phonon-phonon interaction mechanism in Zn0.96 Mg0.04S thin films.
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U2 - 10.1063/5.0097992
DO - 10.1063/5.0097992
M3 - Article
C2 - 35803800
AN - SCOPUS:85133734916
SN - 0021-9606
VL - 157
SP - 014703
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 1
M1 - 014703
ER -