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 tight-binding molecular dynamics
Guizzetti, G., Marabelli, F., Patrini, M., Pellegrino, P., Pivac, B., Miglio, L., et al. (1997). Measurement and simulation of anisotropy in the infrared and Raman spectra of beta-FeSi2 single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER, 55(21), 14290-14297 [10.1103/PhysRevB.55.14290].
Measurement and simulation of anisotropy in the infrared and Raman spectra of beta-FeSi2 single crystals
Miglio, L;
1997
Abstract
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 tight-binding molecular dynamics
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