A Local Statistical Structural Model for Amorphous Solids

From Raman spectroscopic study on OH stretching bands, the local statistical interpretation for water structure is proposed. Due to the closely structural relationship between amorphous solids and liquids, the structural model is extended to investigate the amorphous solids, which indicates that various intensity of potential can be expected around an atom (molecule). From this, a local statistical order parameter is proposed to understand the short-range order and long-range disorder. The order parameter is influenced by the cooling rate in the glass formation, which means that glass is formed with a slower cooling rate, and has higher structural order. For amorphous solids, the geometric topology is closely related to chemical bonding type, such as covalent bond and metallic bond.