论文标题
准定位振动模式，玻色子峰和模型质量弹簧网络中的声音衰减
Quasi-localized vibrational modes, Boson peak and sound attenuation in model mass-spring networks
论文作者
论文摘要
我们介绍了一种算法，该算法通过调整局部弹性特性的波动，保持固定的连接并控制预应力，从而模仿玻璃的弹性特性模仿镜头的算法。在二维中，算法再现了气体振动特性的依赖性，例如准定位的振动模式和玻色子峰对稳定性的依赖性。声音衰减显示在不同频率下的瑞利散射和不当行驶方案，并且随着稳定性的提高，衰减率增加。我们的结果在无序固体的振动特征与局部弹性特性的波动之间建立了牢固的联系，并为研究眼镜的振动异常提供了新的方法。
We introduce an algorithm that constructs disordered mass-spring networks whose elastic properties mimic that of glasses by tuning the fluctuations of the local elastic properties, keeping fixed connectivity and controlling the prestress. In two dimensions, the algorithm reproduces the dependence of gasses' vibrational properties, such as quasi-localised vibrational modes and Boson peak, on the degree of stability. The sound attenuation displays Rayleigh scattering and disorder-broadening regimes at different frequencies, and the attenuation rate increases with increased stability. Our results establish a strong connection between the vibrational features of disordered solids and the fluctuations of the local elastic properties and provide a new approach to investigating glasses' vibrational anomalies.
