Maxwell rigidity and topological constraints in amorphous phase-change networks

Journal Article · Mon Dec 12 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3653603· OSTI ID:21612361

Micoulaut, M ^[1]; Otjacques, C; Raty, J -Y ^[2]; Bichara, C ^[3]

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1. Laboratoire de Physique Theorique de la Matiere Condensee, Universite Pierre et Marie Curie, Boite 121, CNRS UMR 7600, 4 place Jussieu, 75252 Paris Cedex 05 (France)
2. Physique de la Matiere Condensee, B5, Universite de Liege, B4000 Sart-Tilman (Belgium)
3. Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), CNRS and Aix-Marseille Universities, Campus de Luminy, Case 913, 13288 Marseille (France)

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.

• OSTI ID: 21612361
• Journal Information: AIP Conference Proceedings, Vol. 1393, Issue 1; Conference: ICACNM-2011: International conference on advances in condensed and nano materials, Chandigarh (India), 23-26 Feb 2011; Other Information: DOI: 10.1063/1.3653603; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
AMORPHOUS STATE
ANTIMONY TELLURIDES
COMPUTERIZED SIMULATION
GERMANIUM TELLURIDES
GLASS
MOLECULAR DYNAMICS METHOD
PHASE CHANGE MATERIALS
PHASE DIAGRAMS
PHASE STABILITY
PHASE STUDIES
TELLURIUM
TOPOLOGY
ANTIMONY COMPOUNDS
CALCULATION METHODS
CHALCOGENIDES
DIAGRAMS
ELEMENTS
GERMANIUM COMPOUNDS
INFORMATION
MATERIALS
MATHEMATICS
SEMIMETALS
SIMULATION
STABILITY
TELLURIDES
TELLURIUM COMPOUNDS