Collective modes and gapped momentum states in liquid Ga: experiment, theory and simulation
Abstract
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 -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 , whereas theory and modelling agree in a wide range of temperature and -points. We observe the emergence and development of the -gap in the transverse sector which increases with temperature and inverse of relaxation time as predicted theoretically.
Keywords
Cite
@article{arxiv.2005.00470,
title = {Collective modes and gapped momentum states in liquid Ga: experiment, theory and simulation},
author = {Ramil M. Khusnutdinoff and Cillian Cockrell and Oliver A. Dicks and Anders C. S. Jensen and Manh Duc Le and Ling Wang and Martin T. Dove and Anatolii V. Mokshin and Vadim Brazhkin and Kostya Trachenko},
journal= {arXiv preprint arXiv:2005.00470},
year = {2020}
}
Comments
11 pages, 8 figures Reference to theoretical equations used in version 1 (arXiv:2005.00470v1) is corrected