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Measurement and simulation of anisotropy in the Infrared and Raman spectra of beta-FeSi2 single crystals
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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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GUIZZETTI, G., et al. Measurement and simulation of anisotropy in the Infrared and Raman spectra of beta-FeSi2 single crystals. Physical Review B. 1997. Vol. 55, num. 21, pags. 14290-14297. ISSN 0556-2813. [consulted: 15 of August of 2026]. Available at: https://hdl.handle.net/2445/10598