Liquid dynamics at metal-nonmetal transition-Attempt at description of the phase transition through fluctuations-

我们测量了金属-非金属转变区的液体动力学，并讨论了动力学与转变所产生的涨落之间的关系。实验方法为非弹性X射线散射法和小角X射线散射法，样品体系为液态Se-Te混合物，具有代表性的金属-非金属过渡体系和超临界流体水，是已知涨落与气液相变关系的标准体系。这些测量揭示了过渡区的两个共同特征：密度波动和“快声音”现象。

We measured liquid dynamics at metal-nonmetal transition region and discussed the relation between the dynamic and the fluctuations derived from the transition. The experimental methods are inelastic x-ray scattering and small-angle x-ray scattering measurements ; the sample systems are liquid Se-Te mixtures, that are representative metal-nonmetal transition system and supercritical fluid water, which is as a standard system that the relation between fluctuations and liquid-gas transition is already known. These measurements revealed two common features in the transition region : density fluctuations and "fast sound" phenomena.