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Low-Frequency Dynamics and Its Correlation of Nanoscale Structures in Amorphous Solids

作者：Weiming Yang， Wenyu Li，Qi Jiang，Juntao Huo，Yucheng Zhao， Haishun Liu    时间：2021-06-22    点击数：

Photonic specifc heat divided by cube of temperature versus temperature for Pd41.25Cu41.25P17.5, Zr46.75Ti8.25Cu7.5Ni10Be27.5and Fe64.8Co7.2B20Si4Nb4metallic glasses from top to down, respectively. The red lines through the data are based on a calculation that the contribution from two Einstein oscillators is added to the Debye oscillators. Inset: Zoom-in of the Fe64.8Co7.2B20Si4Nb4 data. The green dashed line through the data is based on a hypothesis that one kind of Einstein oscillators exist besides Debye oscillators (Color fgure online)


Relationship among Einstein and Debye frequency for ten kinds of amorphous solids cover fve typical alloy systems and three non-metallic glasses. The solid lines represent liner fits to the data (Color fgure online)


Schematic illustration of a hypothetical amorphous structure showing local packing of solvent atoms (A), SRO (B) and MRO (C) in the amorphous solid. The B and C denote the outmost atomic shell flled with a majority of solvent atoms. Each of B is made up of a solute atom surrounded by a majority of A. Each of C represents the inner solute atoms surrounded by majority of clusters beyond the SRO. The correlations radius of B and C is about 3 and 7 times of that ofA, respectively (Color fgure online)


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