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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., MARABELLI, F., PATRINI, M., PELLEGRINO, Paolo, PIVAC, B., MIGLIO, L., MEREGALLI, V., LANGE, H., HENRION, W., TOMM, V.. Measurement and simulation of anisotropy in the Infrared and Raman spectra of beta-FeSi2 single crystals. _Physical Review B_. 1997. Vol. 55, núm. 21, pàgs. 14290-14297. [consulta: 14 de gener de 2026]. ISSN: 0556-2813. [Disponible a: https://hdl.handle.net/2445/10598]

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