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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
Summary
Transient fluctuations in a 2D system
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.
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