Structural Development in Ge-rich Ge-S Glasses

Y. Sakaguchi, Boise State University
Dmitri Tenne, Boise State University
Maria Mitkova, Boise State University

Article comments

This is an author-produced, peer-reviewed version of this article. The final, definitive version of this document can be found online at Journal of Non-Crystalline Solids, published by Elsevier. Copyright restrictions may apply. doi: 10.1016/j.jnoncrysol.2009.04.064

Abstract

The Raman spectra of Ge-S glasses in the Ge-rich region from Ge 33 to 46 % have been investigated in order to know the structural development of the network glasses. From the detailed curve fits, we have found that there is an unassigned peak at 410 cm-¹ and it becomes larger with increasing Ge composition. To clarify the structural origin of the peak, we virtually constructed the atomic arrangement of the glassy state starting from the crystalline state through the liquid state and changed the composition gradually depleting the medium in sulfur. From the consideration of the structural modeling and the atomic orbital theory, we suggest that single Ge-S chain is a probable structural origin of the peak.