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Fluctuations at a constrained liquid-solid interface.

Abhishek Chaudhuri1, Debasish Chaudhuri, Surajit Sengupta

  • 1Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore-560080, India. abhishek@rri.res.in

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 13, 2007
PubMed
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This study reveals novel stress-relief mechanisms in trapped solids, where crystals shed entire layers, not partial ones, influencing transport properties. This layering transition is key to understanding interfacial phenomena.

Area of Science:

  • Condensed matter physics
  • Materials science
  • Interfacial phenomena

Background:

  • Solids trapped in liquid baths by external potentials exhibit constrained flat interfaces.
  • Stress beyond a limit triggers novel interfacial fluctuations.

Purpose of the Study:

  • Investigate stress-induced layering transitions in trapped solids.
  • Analyze the influence of these transitions on mass, momentum, and energy transport.
  • Characterize heat transport and Kapitza resistance during layering.

Main Methods:

  • Theoretical study of a two-dimensional solid-liquid interface.
  • Analysis of stress-relief mechanisms via layer addition/deletion.
  • Investigation of transport phenomena (mass, momentum, energy, heat).

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Main Results:

  • Identified a generic "layering" transition involving whole crystal layer removal/addition.
  • Demonstrated that momentum impulses cause spallation of entire layers due to kinetic/energetic constraints.
  • Quantified liquid, solid, and interfacial resistances (Kapitza resistance) during transitions.

Conclusions:

  • Layering transitions are a fundamental response to stress in trapped solids.
  • Transport properties are significantly influenced by these structural transformations.
  • Heat conduction signatures reveal underlying structural changes, explainable by free volume calculations.