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Title: Designing heavy metal oxide glasses with threshold properties from network rigidity

Here, we show that a new class of glasses composed of heavy metal oxides involving transition metals (V{sub 2}O{sub 5}–TeO{sub 2}) can surprisingly be designed from very basic tools using topology and rigidity of their underlying molecular networks. When investigated as a function of composition, such glasses display abrupt changes in network packing and enthalpy of relaxation at T{sub g}, underscoring presence of flexible to rigid elastic phase transitions. We find that these elastic phases are fully consistent with polaronic nature of electronic conductivity at high V{sub 2}O{sub 5} content. Such observations have new implications for designing electronic glasses which differ from the traditional amorphous electrolytes having only mobile ions as charge carriers.
Authors:
;  [1] ;  [2] ;  [3] ;  [4]
  1. School of Electronics and Computing Systems, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio 45221-0030 (United States)
  2. CEMHTI, CNRS UPR 3079, 1D, Avenue de la Recherche Scientifique, 45071 Orleáns Cedex 02 (France)
  3. (Polytech’ Orléans), BP 6749, 45072 Orléans Cedex 02 (France)
  4. Laboratoire de Physique Théorique de la Matière Condensée, Université Pierre et Marie Curie, 4 Place Jussieu, F-75252 Paris Cedex 05 (France)
Publication Date:
OSTI Identifier:
22253669
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 140; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ELECTROLYTES; ENTHALPY; GLASS; HEAVY METALS; PHASE TRANSFORMATIONS; RELAXATION; TRANSITION ELEMENTS; VANADATES; VANADIUM OXIDES