Boson peak preservation in tellurite glasses polymorphism

Author(s)

Lozano, C. G. ; Benchorfi, Hasnaa ; Colas, Maggy ; Messaddeq, Younes ; Delaizir, Gaelle ; Rivera, V. A. G.

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 50, n. 1, p. 5-pg., 2023-12-05.

Abstract

Tellurite glasses exhibit the well-known Boson peak at low frequency, which is attributed to the vibration of transversal modes. A similar signature is observed when crystallizing from a full and congruent manner a parent glass leading to translucent or transparent anti-glass or ceramic polymorphs. However, in those disordered crystalline polymorphs, both transversal and longitudinal modes are observed. Such results were confirmed in two tellurite glass systems, namely the TeO2-Nb2O5-Bi2O3 (TNB) and the TeO2-Ta2O5-Bi2O3 (TTB) by Raman spectroscopy, which generate different Raman spectroscopy lineshape. These unprecedented results validate a large part of the theory already developed by other authors and paves the way to new technological applications. (AU)

• FAPESP's process: 13/07276-1 - CEPOF - Optics and Photonic Research Center
• Grantee: Vanderlei Salvador Bagnato
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 20/04835-3 - Controlling the polarization state of rare earth emissions in tellurite glasses from plasmonic nano antennas
• Grantee: Gaston Lozano Calderón
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 22/05478-5 - Controlling the polarization state of rare-earth emissions in tellurite glasses from plasmonic nanostructures
• Grantee: Gaston Lozano Calderón
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate