title: Designing heavy metal oxide glasses with threshold properties from network rigidity.
abstract: Here, we show that a new class of glasses composed of heavy metal oxides involving transition metals (V2O5-TeO2) 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 Tg, 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 V2O5 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.affiliation: School of Electronics and Computing Systems, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio 45221-0030, USA.
authors.forename: Shibalik
authors.initials: S
authors.lastname: Chakraborty
authors.affiliation: School of Electronics and Computing Systems, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio 45221-0030, USA.
authors.forename: P
authors.initials: P
authors.lastname: Boolchand
authors.affiliation: CEMHTI, CNRS UPR 3079, 1D, Avenue de la Recherche Scientifique, 45071 Orleáns Cedex 02, France.
authors.forename: M
authors.initials: M
authors.lastname: Malki
authors.affiliation: Laboratoire de Physique Théorique de la Matière Condensée, Université Pierre et Marie Curie, 4 Place Jussieu, F-75252 Paris Cedex 05, France.
authors.forename: M
authors.initials: M
authors.lastname: Micoulaut