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  • Letter
  • Open Access

Relation between dynamic heterogeneities observed in scattering experiments and four-body correlations

Kohsei Kanayama1, Taiki Hoshino2, and Ryoichi Yamamoto1,*

  • 1Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan
  • 2RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan

  • *ryoichi@cheme.kyoto-u.ac.jp
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Phys. Rev. Research 4, L022006 – Published 6 April, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.L022006

Abstract

Dynamic heterogeneity is expected to be a key concept for understanding the origin of slow dynamics near the glass transition. In previous studies, quantitative evaluations of dynamic heterogeneity have been attempted using two different routes, i.e., the speckle patterns in scattering experiments or the four-body correlation functions of microscopic configuration data obtained from molecular dynamics simulations or real-space observations using confocal microscopy. However, the physical relationship between these dynamic heterogeneities obtained using different methods has not been clarified. This study proposes a connection between dynamic heterogeneities characterized based on speckle patterns and those obtained from four-body correlations. The validity of the relationship is also clarified.

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Phys. Rev. Research 4, L022006– Published 6 April, 2022
  • Received 17 February 2022
  • Accepted 24 March 2022
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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