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首页> 外文期刊>Physica, B. Condensed Matter >Investigation of vibration spectrum ferroelectric semiconductor SbSBr nanowire
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Investigation of vibration spectrum ferroelectric semiconductor SbSBr nanowire

机译:振动光谱铁电半导体SbSBr纳米线的研究

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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 ω_s~2 of soft infrared (IR) mode of bulk-size SbSBr with the theoretical quasiharmonic low-frequency ω~2 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.
机译:通过动态矩阵的对角化,在准谐波近似中计算了一条SbSBr链(纳米线)在c(z)轴方向上的振动谱与温度的关系。通过将大尺寸SbSBr的软红外(IR)模式的实验低频ω_s〜2与理论上的准谐波低频ω〜2拟合,可以得出c(z)轴方向的振动频率。 SbSBr纳米线。在这项工作中,讨论了SbSBr晶体中沿c(z)轴的原子之间的非谐性和温度常数的温度依赖性。所有软模式(在BZ k = 0时)的非谐都是通过声子之间的相互作用而产生的。

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