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Heterogeneities in supercooled liquids: a density-functional study.

C Kaur1, S P Das

  • 1School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India.

Physical Review Letters
|April 6, 2001
PubMed
Summary
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Density-functional theory (DFT) identified a metastable state with low mass localization, corresponding to a deeply supercooled state. This finding is independent of the specific DFT formulation used.

Area of Science:

  • Condensed Matter Physics
  • Computational Materials Science

Background:

  • Understanding metastable states is crucial for predicting material properties.
  • Supercooled liquids exhibit complex dynamics and structural heterogeneity.

Purpose of the Study:

  • To identify and characterize a metastable state using density-functional theory (DFT).
  • To determine the relationship between this metastable state and supercooled liquid behavior.

Main Methods:

  • Utilized density-functional theory (DFT) to evaluate free energy functionals.
  • Performed computer simulations to analyze particle motion and mass localization.

Main Results:

  • Identified a metastable state characterized by a low degree of mass localization.

Related Experiment Videos

  • This state represents a free energy minimum, independent of the specific DFT used.
  • Simulation results confirm this heterogeneous state corresponds to the deeply supercooled regime.

    • Conclusions:

    • A distinct metastable state exists in supercooled liquids, characterized by delocalized mass.
    • This discovery provides a theoretical framework for understanding supercooled liquid behavior via DFT.
    • The findings are robust across different DFT formulations.