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 dierent 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 dierent 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)I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.