Raman Model Predicting Hardness of Covalent Crystals

Details Raman Model Predicting Hardness of Covalent Crystals Raman Model Predicting Hardness of Covalent Crystals

2009-12-25

arxiv.org/abs/0912.4942v1

Physics

Condensed Matter

Materials Science

11 pages, 2 figures. Any other comments will be greatly appreciated

Scientific paper

Based on the fact that both hardness and vibrational Raman spectrum depend on the intrinsic property of chemical bonds, we propose a new theoretical model for predicting hardness of a covalent crystal. The quantitative relationship between hardness and vibrational Raman frequencies deduced from the typical zincblende covalent crystals is validated to be also applicable for the complex multicomponent crystals. This model enables us to nondestructively and indirectly characterize the hardness of novel superhard materials synthesized under ultra-high pressure condition with the in situ Raman spectrum measurement.

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