Guizzetti, G.Marabelli, F.Patrini, M.Pellegrino, PaoloPivac, B.Miglio, L.Meregalli, V.Lange, H.Henrion, W.Tomm, V.2009-12-282009-12-2819970556-2813https://hdl.handle.net/2445/10598In 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.8 p.application/pdfeng(c) The American Physical Society, 1997AnisotropiaEfecte RamanEspectre infraroigCristallsAnisotropyRaman effectVibrational spectraCrystalsinfo:eu-repo/semantics/article521829info:eu-repo/semantics/openAccess