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Frontiers of self-organization in covalent-bonded glassy networks: a complexity originates from mixed molecular-clustering and chain-crossing in glassy germanoselenides Ge-Se

O. SHPOTYUK1,* , R. GOLOVCHAK2

Affiliation

  1. Institute of Physics of Jan Dlugosz University, 13/15, al. Armii Krajowej, Czestochowa, 42200, Poland
  2. Lviv Scientific Research Institute of Materials of SRC “Carat”, 202, Stryjska str., Lviv, 79031, Ukraine

Abstract

Compositional trends in topological organization of fully-saturated covalent networks are considered at the example of binary Ge-Se glasses. It is shown that previously announced reversibility window, detected in this system with temperaturemodulated differential scanning calorimetry as compositional range of under-marginal non-reversing heat flow, does not correspond to real intermediate phase in terms of global optimally-constrained connectivity. The observed structural complexity is attributed to topological pseudo-self-organization, e.g. effect originated from mixed over-constrained molecular-clustering and optimally-constrained inter-cluster chain crossing..

Keywords

Chalcogenide glass, Self-organization, Constraints, Elastic phase.

Submitted at: April 18, 2012
Accepted at: July 19, 2012

Citation

O. SHPOTYUK, R. GOLOVCHAK, Frontiers of self-organization in covalent-bonded glassy networks: a complexity originates from mixed molecular-clustering and chain-crossing in glassy germanoselenides Ge-Se, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 7-8, pp. 596-602 (2012)