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INVESTIGATION OF NANOPHASE SEPARATION IN GLASSY As40Se60 USING RAMAN SCATTERING AND AB INITIO CALCULATIONS

N. Mateleshko1, V. Mitsa1,* , M. Veres2, M. Koos2

Affiliation

  1. Uzhgorod State University, Department of Solid State Electronics 32, Voloshin str., 88000 Uzhgorod, Ukraine
  2. aResearch Institute for Solid State Physics and Optics H-1121 Budapest Konkoly Thege M. u. 29-33, Hungary

Abstract

Raman spectra of stoichiometric glass (g) g-As40Se60 have been investigated. It was observed that the increasing of excitation radiation energy h>E0 (E0 is pseudogap width) changes the shape and position of Raman peaks of g-As40Se60. The structure and vibration spectra of some As-Se clusters were calculated applying Hartree-Fock (HF) and density functional theory (DFT). In order to elucidate structural features of g-As40Se60, we combined the experimental Raman data and theoretical calculations..

Keywords

Chalcogenide glasses, Raman spectra, Clusters.

Submitted at: Dec. 7, 2004
Accepted at: March 23, 2005

Citation

N. Mateleshko, V. Mitsa, M. Veres, M. Koos, INVESTIGATION OF NANOPHASE SEPARATION IN GLASSY As40Se60 USING RAMAN SCATTERING AND AB INITIO CALCULATIONS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 2, pp. 991-996 (2005)