【摘 要】
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The structural description for the link between the fast vibrational dynamics and slow diffusive dynamics in glass-forming systems is one of the most challe
【机 构】
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InternationalCenterforQuantumMaterials,PekingUniversity
【出 处】
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第十一届全国软物质与生命物质物理学术会议
论文部分内容阅读
The structural description for the link between the fast vibrational dynamics and slow diffusive dynamics in glass-forming systems is one of the most challenging issues in physical science.In this talk,I will discuss structural origin and its correlation with dynamic transition in supercooled liquids.Particular,in a model of metallic supercooled liquid,we find that local connectivity as an atomic-level structural order parameter tunes the short-time vibrational excitations of the icosahedrally coordinated particles and meanwhile modulates their long-time relaxation dynamics changing from stretched to compressed exponentials,denoting a dynamic transition from diffusive to hyperdiffusive motions.Our result indicates that long-time dynamics has a structural origin,thus suggesting a structural link the fast vibrational dynamics and the slow structural relaxation in glassy materials.
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