[en] By analyzing first-principles molecular-dynamics simulations of different telluride amorphous networks, we develop a method for the enumeration of radial and angular topological constraints, and show that the phase diagram of the most popular system Ge-Sb-Te can be split into two compositional elastic phases: a tellurium rich flexible phase and a stressed rigid phase that contains most of the materials used in phase-change applications. This sound atomic scale insight should open new avenues for the understanding of phase-change materials and other complex amorphous materials from the viewpoint of rigidity.
Disciplines :
Physics
Author, co-author :
Micoulaut, M.
Otjacques, C.
Raty, Jean-Yves ; Université de Liège - ULiège > Département de physique > Physique de la matière condensée
Bichara, C.
Language :
English
Title :
Maxwell rigidity and topological constraints in amorphous phase-change networks
Publication date :
2011
Event name :
International Conference on Advances in Condensed and nano Materials (icacnm-2011)
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