The topological phase transition in some Ge-Sb-S glasses and thin films

• Published in: The Journal of physics and chemistry of solids Vol. 55; no. 7; pp. 575 - 578
• Main Authors: Savova, E., Skordeva, E., Vateva, E.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.07.1994; Elsevier
• Subjects: A. amorphous material; A. chalcogenides; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; D. optical properties; D. phase transitions; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity); Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physical properties of thin films, nonelectronic; Physics; Solid-solid transitions; Solubility, segregation, and mixing; phase separation; Specific phase transitions; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); A. amorphous material; D. optical properties; D. phase transitions; A. chalcogenides; Antimony sulfides; Thin films; Energy gap; Inorganic compounds; Phase transformations; Solubility; Chemical composition; Germanium sulfides; Experimental study; Chalcogenide glasses
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/0022-3697(94)90055-8

The composition dependences of the mean gramme-atomic volume, density and compactness of bulk glasses from the (GeS 1.5) y ·(Sb 2 S 3) 1− y line are investigated, as well as the optical bandgap, solubility and selective solubility of the thin films prepared from the glasses. At an average coordination number Z≈ 2.67, well expressed peculiarities are observed, related to a topological transition. It is demonstrated that the metallization of the bonds during the substitution of arsenic with antimony affects but does not prevent the transition, typical of the structure of glasses and thin films.