کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1812980 | 1025628 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The experimental and theoretical investigation of vibration spectra in ferroelectric semiconductor SbSBrxI1−x crystals The experimental and theoretical investigation of vibration spectra in ferroelectric semiconductor SbSBrxI1−x crystals](/preview/png/1812980.png)
The vapor grown SbSBrxI1−x (x=0.1; 0.5; 0.9) crystals with clear mirror surfaces have been used for infrared reflection measurements with Fourier spectrometer. The vibration frequencies along c(z)-axis have been derived from Kramers–Kroning and optical parameters fitting analysis of the experimental reflectivity spectra at T=300 K. The theoretical vibration spectra of SbSBrxS1−x (x=0.1; 0.5; 0.9) crystals in paraelectric phase (T=300 K) along c(z)-axis have been determined in quasiharmonic approximation by diagonalization of dynamical matrix. The theoretical vibration spectra of these crystals in a–b(x−y) plane have been determined in harmonic approximation. In this work we discuss the nature of anharmonism in SbSBrxI1−x crystals along the c(z)-axis.
Journal: Physica B: Condensed Matter - Volume 404, Issue 21, 15 November 2009, Pages 3941–3946