We have performed a comparative study of optical properties of isostructural beta -FeSi2, OsSi2, and two ternary configurations of (FeOs)Si-2 by first-principle calculations of band structure and the imaginary part of the dielectric Function. The latter for beta -FeSi2 and OsSi2 were compared to those deduced from ellipsometric measurements: indicating an excellent agreement. From theoretical calculations both binaries are found to be indirect gap semiconductors, whereas one ternary is characterised by a direct transition with high oscillator strength. (C) 2001 Elsevier Science B.V. All rights reserved.
Migas, D., Henrion, W., Rebien, M., Shaposhnikov, V., Borisenko, V., Miglio, L. (2001). Optical properties of isostructural beta-FeSi2, OsSi2, Fe0.5Os0.5Si2 and Os0.5Fe0.5Si2. OPTICAL MATERIALS, 17(1), 335-338 [10.1016/S0925-3467(01)00056-8].
Optical properties of isostructural beta-FeSi2, OsSi2, Fe0.5Os0.5Si2 and Os0.5Fe0.5Si2
MIGLIO, LEONIDA
2001
Abstract
We have performed a comparative study of optical properties of isostructural beta -FeSi2, OsSi2, and two ternary configurations of (FeOs)Si-2 by first-principle calculations of band structure and the imaginary part of the dielectric Function. The latter for beta -FeSi2 and OsSi2 were compared to those deduced from ellipsometric measurements: indicating an excellent agreement. From theoretical calculations both binaries are found to be indirect gap semiconductors, whereas one ternary is characterised by a direct transition with high oscillator strength. (C) 2001 Elsevier Science B.V. All rights reserved.
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