Publication

Structure of liquid GexSe1-x at the stiffness threshold composition

Alfredo Pasquarello
1998
Journal Articles

Abstract

We investigate by first-principles molecular dynamics the structural properties of liquid GeSe4, i.e., GexSe1-x at x = 0.2. This composition is very close to the so-called stiffness threshold composition, at which dramatic changes in a series of experimental properties occur. The calculated total neutron structure factor is in very good agreement with experiment. The results show that liquid GeSe4 is a good prototype of a chemically ordered network. It consists of GeSe4 tetrahedra that are connected by either shared Se atoms or Se chains.

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https://infoscience.epfl.ch/entities/publication/0342f559-38c2-436e-b53f-b45595dcfad1

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Alfredo Pasquarello
1998
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/0342f559-38c2-436e-b53f-b45595dcfad1

About this result

Related concepts (28)

Composite material

A composite material (also called a composition material or shortened to composite, which is the common name) is a material which is produced from two or more constituent materials. These constituent materials have notably dissimilar chemical or physical properties and are merged to create a material with properties unlike the individual elements. Within the finished structure, the individual elements remain separate and distinct, distinguishing composites from mixtures and solid solutions.

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The glass–liquid transition, or glass transition, is the gradual and reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle "glassy" state into a viscous or rubbery state as the temperature is increased. An amorphous solid that exhibits a glass transition is called a glass. The reverse transition, achieved by supercooling a viscous liquid into the glass state, is called vitrification.

Structure

A structure is an arrangement and organization of interrelated elements in a material object or system, or the object or system so organized. Material structures include man-made objects such as buildings and machines and natural objects such as biological organisms, minerals and chemicals. Abstract structures include data structures in computer science and musical form. Types of structure include a hierarchy (a cascade of one-to-many relationships), a network featuring many-to-many links, or a lattice featuring connections between components that are neighbors in space.

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Structure of liquid GexSe1-x at the stiffness threshold composition

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