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Collective modes and gapped momentum states in liquid Ga: Experiment, theory, and simulation
- Source :
- Physical Review B. 101
- Publication Year :
- 2020
- Publisher :
- American Physical Society (APS), 2020.
-
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 $k$-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.<br />11 pages, 8 figures Reference to theoretical equations used in version 1 (arXiv:2005.00470v1) is corrected
- Subjects :
- Physics
Range (particle radiation)
FOS: Physical sciences
Molecular dynamics modeling
Inverse
02 engineering and technology
Condensed Matter - Soft Condensed Matter
021001 nanoscience & nanotechnology
01 natural sciences
Inelastic neutron scattering
Momentum
Transverse plane
Quantum mechanics
0103 physical sciences
Quasiparticle
Soft Condensed Matter (cond-mat.soft)
Development (differential geometry)
010306 general physics
0210 nano-technology
Subjects
Details
- ISSN :
- 24699969 and 24699950
- Volume :
- 101
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi.dedup.....2981a2c40c25ca4b53608e36d07b2eb2