Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 82234 Weßling, Germany.
Joint Institute for High Temperatures, Russian Academy of Sciences, 125412 Moscow, Russia.
J Chem Phys. 2019 Mar 14;150(10):104503. doi: 10.1063/1.5088141.
A simple practical approach to describe transverse (shear) waves in strongly-coupled Yukawa fluids is presented. Theoretical dispersion curves, based on hydrodynamic consideration, are shown to compare favorably with existing numerical results for plasma-related systems in the long-wavelength regime. The existence of a minimum wave number below which shear waves cannot propagate and its magnitude are properly accounted in the approach. The relevance of the approach beyond plasma-related Yukawa fluids is demonstrated by using experimental data on transverse excitations in liquid metals Fe, Cu, and Zn, obtained from inelastic x-ray scattering. Some potentially important relations, scalings, and quasi-universalities are discussed. The results should be interesting for a broad community in chemical physics, materials physics, physics of fluids and glassy state, complex (dusty) plasmas, and soft matter.
本文提出了一种简单实用的方法来描述强耦合 Yukawa 流体中的横波（剪切波）。基于流体动力学考虑的理论色散曲线与长波条件下与等离子体相关系统的现有数值结果进行了很好的比较。该方法适当地考虑了存在一个最小波数，低于该波数剪切波无法传播，以及其大小。该方法的应用范围不仅限于与等离子体相关的 Yukawa 流体，还通过对液态金属 Fe、Cu 和 Zn 的非弹性 X 射线散射实验数据进行了横向激发的研究进行了证明。讨论了一些潜在的重要关系、标度和准普适性。这些结果对于化学物理、材料物理、流体和玻璃态物理、复杂（尘埃）等离子体和软物质领域的广大研究人员都将具有重要意义。
