Next Article in Journal
EMuS Muon Facility and Its Application in the Study of Magnetism
Previous Article in Journal
Evaluation of Residual Stress Relaxation in a Rolled Joint by Neutron Diffraction
Previous Article in Special Issue
Investigation of Structure and Dynamics in Disordered Materials Using Containerless Techniques with In-Situ Quantum Beam and Thermophysical Property Measurements
Article Menu
Issue 4 (December) cover image

Export Article

Open AccessReview

Real-Space Description of Dynamics of Liquids

1,2,3,4
1
Shull-Wollan Center, Joint-Institute for Neutron Sciences, P. O. Box 2008, MS-6453, Oak Ridge, TN 37831-6453, USA
2
Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA
3
Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA
4
Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Quantum Beam Sci. 2018, 2(4), 22; https://doi.org/10.3390/qubs2040022
Received: 11 April 2018 / Revised: 18 October 2018 / Accepted: 23 October 2018 / Published: 28 October 2018
(This article belongs to the Special Issue Selected Reviews in Quantum Beam Science)
  |  
PDF [2888 KB, uploaded 28 October 2018]
  |  

Abstract

In strongly disordered matter, such as liquids and glasses, atomic and magnetic excitations are heavily damped and partially localized by disorder. Thus, the conventional descriptions in terms of phonons and magnons are inadequate, and we have to consider spatially correlated atomic and spin dynamics in real-space and time. Experimentally this means that the usual representation of dynamics in terms of the dynamic structure factor, S(Q, E), where Q and E are the momentum and energy exchanges in scattering, is insufficient. We propose a real-space description in terms of the dynamic pair-density function (DyPDF) and the Van Hove function (VHF) as an alternative, and discuss recent results on superfluid 4He by inelastic neutron scattering and water by inelastic X-ray scattering. Today much of the objects of research in condensed-matter physics and materials science are highly complex materials. To characterize the dynamics of such complex materials, the real-space approach is likely to become the mainstream method of research. View Full-Text
Keywords: liquids; inelastic scattering; real-space dynamics; Van Hove function liquids; inelastic scattering; real-space dynamics; Van Hove function
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Egami, T. Real-Space Description of Dynamics of Liquids. Quantum Beam Sci. 2018, 2, 22.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Quantum Beam Sci. EISSN 2412-382X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top