In the present paper we present preliminary results on the linear optical properties of Si-Ge alloys [1]. The Si-Ge alloy system has been simulated by a set of (positionally ordered) crystals where Ge and Si atoms are distributed in di erent ways into diamond-like lattice sites [2]. Optical absorption spectra have been determined within the DFT-LDA-RPA approximation as function of the composition of the alloy. Present results have been compared with available experimental data and other theoretical results [2,3]. [1] A. Qteish, R. Resta, Phys. Rev. 37, 6983 (1988) [2] R. Braunstein, A. R. Moore, F. Herman Phys. Rev. 169, 695 (1958) [3] U. Schmidt, N.E. Christensen, M. Cardona Phys. Rev. 41, 5919 (1990)

Optical Properties of Germanium-Silicon Alloys

CAPPELLINI, GIANCARLO;
2003-01-01

Abstract

In the present paper we present preliminary results on the linear optical properties of Si-Ge alloys [1]. The Si-Ge alloy system has been simulated by a set of (positionally ordered) crystals where Ge and Si atoms are distributed in di erent ways into diamond-like lattice sites [2]. Optical absorption spectra have been determined within the DFT-LDA-RPA approximation as function of the composition of the alloy. Present results have been compared with available experimental data and other theoretical results [2,3]. [1] A. Qteish, R. Resta, Phys. Rev. 37, 6983 (1988) [2] R. Braunstein, A. R. Moore, F. Herman Phys. Rev. 169, 695 (1958) [3] U. Schmidt, N.E. Christensen, M. Cardona Phys. Rev. 41, 5919 (1990)
2003
electronic properties
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/38993
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