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Transient structured fluctuations in a two-dimensional system with multiple ordered phases.

Zach Krebs1, Ari B Roitman1, Linsey M Nowack1

  • 1James Franck Institute, University of Chicago, Chicago, Illinois 60637, USA.

The Journal of Chemical Physics
|July 25, 2018
PubMed
Summary
This summary is machine-generated.

Transient fluctuations in a 2D system

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Area of Science:

  • Condensed matter physics
  • Statistical mechanics
  • Materials science

Background:

  • Two-dimensional systems exhibit diverse ordered phases.
  • Understanding liquid phase fluctuations is crucial for phase transitions.

Purpose of the Study:

  • To determine the symmetry spectrum of transient fluctuations in the liquid phase.
  • To identify density domains supporting specific structured fluctuations.

Main Methods:

  • Analysis of particle configurations using same-time aperture cross-correlation functions.
  • Investigation across various fluid regions near and far from phase transition lines.

Main Results:

  • Liquid phase exhibits hexagonal symmetry fluctuations near liquid-hexatic transitions.
  • Hexagonal and square symmetry fluctuations are observed in the liquid between hexatic-to-liquid and liquid-to-square solid transitions.
  • Fluctuations correlate with lower-temperature ordered phases even deep within the liquid phase.

Conclusions:

  • Liquid phase fluctuations are limited to the symmetries of the system's ordered phases.
  • No evidence found for fluctuations with symmetries other than those of the ordered phases.