Maxwell rigidity and topological constraints in amorphous phase-change networks

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 elast...

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Bibliographic Details
Main Authors: Micoulaut, M., Otjacques, C., Raty, Jean-Yves, Bichara, C.
Format: Conference Proceeding
Language:English
Subjects:
ab initio
AMORPHOUS STATE
ANTIMONY COMPOUNDS
ANTIMONY TELLURIDES
CALCULATION METHODS
CHALCOGENIDES
COMPUTERIZED SIMULATION
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIAGRAMS
ELEMENTS
GERMANIUM COMPOUNDS
GERMANIUM TELLURIDES
GLASS
glasses
INFORMATION
MATERIALS
MATERIALS SCIENCE
MATHEMATICS
MOLECULAR DYNAMICS METHOD
PHASE CHANGE MATERIALS
PHASE DIAGRAMS
PHASE STABILITY
PHASE STUDIES
Physical, chemical, mathematical & earth Sciences
Physics
Physique
Physique, chimie, mathématiques & sciences de la terre
SEMIMETALS
SIMULATION
STABILITY
TELLURIDES
TELLURIUM
TELLURIUM COMPOUNDS
TOPOLOGY
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Summary: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.
ISSN:1551-7616
0094-243X
1551-7616
DOI:10.1063/1.3653603