European Synchrotron Radiation Facility, Grenoble, France.
Phys Rev Lett. 2011 Jun 3;106(22):225501. doi: 10.1103/PhysRevLett.106.225501. Epub 2011 May 31.
We compare the atomic dynamics of the glass to that of the relevant crystal. In the spectra of inelastic scattering, the boson peak of the glass appears higher than the transverse acoustic (TA) singularity of the crystal. However, the density of states shows that they have the same number of states. Increasing pressure causes the transformation of the boson peak of the glass towards the TA singularity of the crystal. Once corrected for the difference in the elastic medium, the boson peak matches the TA singularity in energy and height. This suggests the identical nature of the two features.
我们将玻璃的原子动力学与相关晶体的原子动力学进行了比较。在非弹性散射的光谱中，玻璃的声子峰高于晶体的横声学（TA）奇异点。然而，态密度表明它们具有相同的态数。增加压力会导致玻璃的声子峰向晶体的 TA 奇异点转变。一旦对弹性介质的差异进行了修正，声子峰在能量和高度上与 TA 奇异点匹配。这表明这两个特征具有相同的性质。
