Atomic-charge distribution in glasses by terahertz spectroscopy

Details Atomic-charge distribution in glasses by terahertz spectroscopy Atomic-charge distribution in glasses by terahertz spectroscopy

2007-08-29

arxiv.org/abs/0708.3982v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

Scientific paper

10.1088/0953-8984/19/45/455216

It is demonstrated that the width of the uncorrelated atomic-charge distribution in glasses can be extracted from the frequency dependence of the coupling coefficient for the far-infrared absorption measured experimentally by the time-domain terahertz spectroscopy technique. This value for As2S3 glass is found to be 0.12 (e). A density functional theory-based tight-binding molecular dynamics model of As2S3 glass qualitatively supports these findings.

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