Correlation between structure and physical properties of chalcogenide glasses in the AsxSe1-x system

Guang Yang, Bruno Bureau, Tanguy Rouxel, Yann Gueguen, Ozgur Gulbiten, Claire Roiland, Emmanuel Soignard, Jeffery Yarger, Johann Troles, Jean Christophe Sangleboeuf, Pierre Lucas

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130 Scopus citations


Physical properties of chalcogenide glasses in the Asx Se 1-x system have been measured as a function of composition including the Young's modulus E, shear modulus G, bulk modulus K, Poisson's ratio ν, the density ρ, and the glass transition Tg. All these properties exhibit a relatively sharp extremum at the average coordination number 〈r〉 =2.4. The structural origin of this trend is investigated by Raman spectroscopy and nuclear magnetic resonance. It is shown that the reticulation of the glass structure increases continuously until x=0.4 following the "chain crossing model" and then undergoes a transition toward a lower dimension pyramidal network containing an increasing number of molecular inclusions at x>0.4. Simple theoretical estimates of the network bonding energy confirm a mismatch between the values of mechanical properties measured experimentally and the values predicted from a continuously reticulated structure, therefore corroborating the formation of a lower dimension network at high As content. The evolution of a wide range of physical properties is consistent with this sharp structural transition and suggests that there is no intermediate phase in these glasses at room temperature.

Original languageEnglish (US)
Article number195206
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number19
StatePublished - Nov 17 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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