کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7691313 | 1495988 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of the phonon band gap effect on Raman-active optical phonons in SrMoO4 crystal
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Investigation of the phonon band gap effect on Raman-active optical phonons in SrMoO4 crystal Investigation of the phonon band gap effect on Raman-active optical phonons in SrMoO4 crystal](/preview/png/7691313.png)
چکیده انگلیسی
The phonon dispersions of SrMoO4 crystal are calculated using the lattice dynamical calculations approach. Spontaneous Raman spectra in the SrMoO4 were measured in the temperature range from 10Â K to 295Â K, and the temperature dependence of the linewidth of the Bg (95Â cmâ1) and Ag (888Â cmâ1) Raman modes was analyzed using the lattice dynamical perturbative approach. We found that different behaviors of these two modes in the case of temperature broadening could be attributed to the large energy band gap in the phonon spectrum resulting in different anharmonic interactions. The calculated temperature dependence of the linewidth of Ag (888Â cmâ1) mode was well accounted for the experimental one by including both down-conversion by the cubic term and the dephasing by quartic term. The dephasing processes are increased only at high temperatures and the effect of dephasing is related to the size of a large phonon band gap.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 71, March 2014, Pages 6-11
Journal: Vibrational Spectroscopy - Volume 71, March 2014, Pages 6-11
نویسندگان
Jun Suda, Petr G. Zverev,