scispace - formally typeset
Journal ArticleDOI

Topology of covalent non-crystalline solids I: Short-range order in chalcogenide alloys

James C. Phillips
- 01 Oct 1979 - 
- Vol. 34, Iss: 2, pp 153-181
Reads0
Chats0
TLDR
In this article, an atomic model is introduced which for predominantly covalent forces constitutes the first microscopic realization of Kauzmann's description of the glass transition as an entropy (not enthalpy or volume) crisis.
Abstract
The pronounced glass-forming tendencies of alloys of S and Se with Ge and/or As are discussed topologically. An atomic model is introduced which for predominantly covalent forces constitutes the first microscopic realization of Kauzmann's description of the glass transition as an entropy (not enthalpy or volume) crisis. The model contains no adjustable parameters and predicts the glass-forming tendency as a function of composition in excellent agreement with experiment. Several related properties, including phase diagrams, radial distribution functions and crystal structures are discussed in the context of chemical bonding and short-range order in the non-crystalline covalent networks of these materials.

read more

Citations
More filters
Journal ArticleDOI

High-κ gate dielectrics: Current status and materials properties considerations

TL;DR: In this paper, a review of the literature in the area of alternate gate dielectrics is given, based on reported results and fundamental considerations, the pseudobinary materials systems offer large flexibility and show the most promise toward success.
Journal ArticleDOI

Diamond-like amorphous carbon

TL;DR: In this paper, the authors describe the deposition methods, deposition mechanisms, characterisation methods, electronic structure, gap states, defects, doping, luminescence, field emission, mechanical properties and some applications of diamond-like carbon.
Journal ArticleDOI

Spin glasses: Experimental facts, theoretical concepts, and open questions

TL;DR: In this article, the most characteristic properties of spin glass systems are described, and related phenomena in other glassy systems (dielectric and orientational glasses) are mentioned, and a review summarizes recent developments in the theory of spin glasses, as well as pertinent experimental data.
Journal ArticleDOI

Continuous deformations in random networks

TL;DR: In this paper, the authors examine the differences between covalent random networks with high and low average coordination and make rigorous assumptions about the number of continuous deformations (i.e., zero frequency modes) allowed within the network.
Journal ArticleDOI

Perspective on the glass transition

TL;DR: In this paper, the authors examined the effect of viscosity divergence on the stability of the Vogel-Fulcher equation for viscoherence in the energy topology-controlled regime.
References
More filters
Journal ArticleDOI

Ordering, metastability and phase transitions in two-dimensional systems

TL;DR: In this article, a new definition of order called topological order is proposed for two-dimensional systems in which no long-range order of the conventional type exists, and the possibility of a phase transition characterized by a change in the response of the system to an external perturbation is discussed in the context of a mean field type of approximation.
Journal ArticleDOI

Molecular Transport in Liquids and Glasses

TL;DR: In this paper, the authors derived a relation between the diffusion constant D in a liquid of hard spheres and the free volume vf, which is based on the concept that statistical redistribution of free volume occasionally opens up voids large enough for diffusive displacement.
Journal ArticleDOI

Effect of Invariance Requirements on the Elastic Strain Energy of Crystals with Application to the Diamond Structure

P. N. Keating
- 13 May 1966 - 
TL;DR: In this paper, the Born-Huang procedure is applied to the calculation of the elasticity of a two-constant model of the diamond type of crystal, and this predicts the relation