A semi-quantitative scattering theory of amorphous materials

Details A semi-quantitative scattering theory of amorphous materials A semi-quantitative scattering theory of amorphous materials

2008-05-16

arxiv.org/abs/0805.2575v2

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 2 figures, will be submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevB.78.195208

It is argued that topological disorder in amorphous solids can be described by local strains related to local reference crystals and local rotations. An intuitive localization criterion is formulated from this point of view. The Inverse Participation Ratio and the location of mobility edges in band tails is directly related to the character of the disorder potential in amorphous solid, the coordination number, the transition integral and the nodes of wave functions of the corresponding reference crystal. The dependence of the decay rate of band tails on temperature and static disorder are derived. \textit{Ab initio} simulations on a-Si and experiments on a-Si:H are compared to these predictions.

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