Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1812474 | Physica B: Condensed Matter | 2010 | 6 Pages |
Abstract
The temperature dependence of vibration spectra of one SbSBr chain (nanowire) in the direction of the c(z)-axis has been calculated in quasiharmonic approximation by diagonalization of dynamical matrix. The vibrational frequencies in the direction of c(z)-axis have been derived by fitting of the experimental low-frequency Ïs2 of soft infrared (IR) mode of bulk-size SbSBr with the theoretical quasiharmonic low-frequency Ï2 of SbSBr nanowires. In this work the nature of anharmonism and temperature dependence of force constants between atoms in SbSBr crystal along c(z)-axis have been discussed. The anharmonism of all soft (at BZ k=0) modes has been created by the interaction between phonons.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
A. Audzijonis, L. Žigas, A. KvedaraviÄius, R. Sereika, R. Žaltauskas, A ÄerÅ¡kus,