Measurement and simulation of anisotropy in the infrared and Raman spectra of beta-FeSi2 single crystals
Measurement and simulation of anisotropy in the infrared and Raman spectra of beta-FeSi2 single crystals
复制标题
β-FeSi2 单晶红外和拉曼光谱各向异性的测量和模拟
DOI：
10.1103/physrevb.55.14290
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发表时间：
1997
影响因子：
3.7
通讯作者：
V. Tomm
中科院分区：
文献类型：
--
作者：
G. Guizzetti;F. Marabelli;M. Patrini;P. Pellegrino;B. Pivac;L. Miglio;V. Meregalli;H. Lange;W. Henrion;V. Tomm
本文证明了FeSi_2的正交相在室温下是稳定的！在红外光谱中显示出相当大的各向异性，在拉曼数据中也具有较小的影响。这一事实并非微不足道，因为晶体结构对应于萤石对称性的适度扭曲。我们的分析进行了小单晶生长的磁通运输，通过偏振分辨远红外反射率和拉曼测量。通过紧束缚分子动力学模拟谱对它们进行了解释。@S0163-1829~97！05418-0#
In this paper we show that the orthorhombic phase of FeSi2 ~stable at room temperature! displays a sizable anisotropy in the infrared spectra, with minor effects in the Raman data too. This fact is not trivial at all, since the crystal structure corresponds to a moderate distortion of the fluorite symmetry. Our analysis is carried out on small single crystals grown by flux transport, through polarization-resolved far-infrared reflectivity and Raman measurements. Their interpretation has been obtained by means of the simulated spectra with tightbinding molecular dynamics. @S0163-1829~97!05418-0#