Hand-Built Models and Bond-Switching Schemes

An ideal starting point in the discussion of the methodologies and applications in the modeling of chalcogenide glasses is with the 

These early hand-built clusters only allowed fourfold coordination and a small spread of bond lengths constrained by the width of the first peak of the experimental g r]. The disordering away from a crystalline diamond structure was obtained by variations in the tetrahedral bond angle and via bond rotations, which results in a distribution of atomic ring sizes. While these initial CRN models mimicked the main features of covalent glasses, the lack of periodicity and termination by free surfaces led to attempts to reproduce these successes via computer-generated CRN models. 

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Hand-Built Models and Bond-Switching Schemes... 

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