论文标题
观察金属眼镜中的高频横向声子
Observation of High-frequency Transverse Phonons in Metallic Glasses
论文作者
论文摘要
使用非弹性中子散射和分子动力学模拟在模型ZR-CU-AL金属玻璃上，我们表明横向声子持续存在于高频式状态中，并且可以在大动量转移中检测到。此外，发现横向声子的明显峰宽度遵循静态结构因子。一对一的对应关系是针对Zr-Cu-Al金属玻璃和三维Lennard-Jones模型玻璃证明的，这表明声子动力学与潜在的无序结构之间存在通用相关性。这种显着的相关性（未发现纵向声子）强调了横向声子在理解无序材料中结构动力学关系中所具有的关键作用。
Using inelastic neutron scattering and molecular dynamics simulations on a model Zr-Cu-Al metallic glass, we show that transverse phonons persist well into the high-frequency regime, and can be detected at large momentum transfer. Furthermore, the apparent peak width of the transverse phonons was found to follow the static structure factor. The one-to-one correspondence, which was demonstrated for both Zr-Cu-Al metallic glass and a 3-dimensional Lennard-Jones model glass, suggests a universal correlation between the phonon dynamics and the underlying disordered structure. This remarkable correlation, not found for longitudinal phonons, underscores the key role that transverse phonons hold for understanding the structure-dynamics relationship in disordered materials.
