Surface-Induced Layering of Quenched 3D Dusty Plasma Liquids: Micromotion and Structural Rearrangement

Area of Science:

• Condensed Matter Physics
• Plasma Physics
• Materials Science

Background:

• Dusty plasma liquids exhibit complex behaviors relevant to condensed matter systems.
• Understanding phase transitions and structural ordering in these systems is crucial for fundamental physics and applications.

Purpose of the Study:

• To experimentally demonstrate confinement surface induced layering in a quenched dusty plasma liquid.
• To investigate the heterogeneous 3D crystalline structure, particle dynamics, and structural rearrangement within this layered region.

Main Methods:

• Experimental demonstration of confinement-induced layering in a quenched dusty plasma liquid.
• Analysis of the layering front's fluctuations using spatial and temporal power spectra.
• Characterization of the 3D crystalline structure, including hexatic order and lattice orientations (fcc, bcc, hcp).

Main Results:

• A fluctuating layering front with turbulent-like behavior was observed, exhibiting power-law decays.
• The layered region formed a 2+1D system with suppressed translayer motion and distinct intralayer hexatic structures.
• Heterogeneous 3D crystalline structures (fcc, bcc, hcp) arose from coupled layers with differing horizontal shifts.
• Particle motions included cage rattling and cooperative hopping, leading to lattice dynamics and domain rearrangements.

Conclusions:

• Confinement-induced layering in dusty plasma liquids creates complex, heterogeneous 3D structures.
• Interlayer slip, driven by differential intralayer dynamics, is key to structural rearrangement.
• The findings offer insights into 3D ordering and dynamics in soft matter and plasma systems.