论文标题
液体GA中的集体模式和宽大的动量状态：实验，理论和模拟
Collective modes and gapped momentum states in liquid Ga: experiment, theory and simulation
论文作者
论文摘要
液体中的集体激发对于理解液体动力学和热力学特性很重要。间隙动量状态（GMS）是预计将在集体激发的横向部门中运行的液体动力学的显着特征。在这里，我们将非弹性中子散射实验，理论和分子动力学建模结合在一起，以在液体GA中的集体激发和GMS中的温度和$ k $ - 点研究集体激发和GM。我们发现，这三条探究线都同意液体动力学的纵向部门。在横向部门中，实验与理论，建模以及较早的X射线实验在较大$ K $的情况下一致，而理论和建模在广泛的温度和$ k $ - 点一致。我们观察到横向部门中$ k $ -GAP的出现和开发，这是根据理论上预测的，随温度和放松时间的倒数而增加。
Collective excitations in liquids are important for understanding liquid dynamical and thermodynamic properties. Gapped momentum states (GMS) are a notable feature of liquid dynamics predicted to operate in the transverse sector of collective excitations. Here, we combine inelastic neutron scattering experiments, theory and molecular dynamics modelling to study collective excitations and GMS in liquid Ga in a wide range of temperature and $k$-points. We find that all three lines of enquiry agree for the longitudinal sector of liquid dynamics. In the transverse sector, the experiments agree with theory, modelling as well as earlier X-ray experiments at larger $k$, whereas theory and modelling agree in a wide range of temperature and $k$-points. We observe the emergence and development of the $k$-gap in the transverse sector which increases with temperature and inverse of relaxation time as predicted theoretically.
