Experimental validation of interpolation method for pair correlations in model crystals

Abstract

Defects play a crucial role in physics of solids, affecting their mechanical, electromagnetic, and chemical properties. However, influence of thermal defects on wave propagation in exothermic reactions (flame fronts) still remains poorly understood at molecular level. Here, we show that thermal behavior of the defects exhibits essential features of double-step exothermic reactions with pre-equilibrium. We use experiments with monolayer complex (dusty) plasma and find that it can show a double-step activation thermal behavior, similar to chemically-reactive media. Furthermore, for the first time we demonstrate capabilities to control flame fronts using defects and the different dynamic regimes of the thermal defects in complex (dusty) plasmas, from non-activated one to being sound-and self-activated (like in active soft matter). The results suggest that a range of challenging phenomena at the forefront of modern science (e.g. defect activation, flame front dynamics, reaction waves etc.) can now be experimentally interrogated on a microscopic scale.

2D colloids in rotating electric fields: A laboratory of strong tunable three-body interactions

“…For silica particles in deionised water, under the same experimental conditions as we had, κσ = σ/λ D ≈ 25.8, as was obtained in Ref. [72].…”

“…The same framework, as we proposed it here, is also suitable for studies of 3D systems. However, gravitationally-compensated colloidal systems [72] and the spatial hodographs of rotating electric field [60] should be used instead of the in-plane rotating field, to create isotropic tunable interactions. The system should be imaged in bulk, and the same methodology as we propose here, can be applied.…”

The role of attraction in the phase diagrams and melting scenarios of generalized 2D Lennard-Jones systems

“…The role of attraction can be tested experimentally in colloidal systems, known for a long time as model systems demonstrating a wide range of "molecularlike" phenomena 1,[47][48][49][50] , in particular, crystallization and melting [51][52][53][54][55][56][57][58][59] , solid-solid phase transitions [60][61][62] , condensation and critical phenomena [63][64][65] caused by relatively short-range attractive depletion forces 66 . These collective phenomena can be visualized in real-time with spatial resolution of individual particles.…”

Direct Experimental Evidence of Longitudinal and Transverse Mode Hybridization and Anticrossing in Simple Model Fluids

“…In order to observe mode anticrossing directly, we performed dedicated experiments with 2D system of charged microparticles in the same manner as described previously. [32][33][34][35][36] To prepare the fluid, we melted 2D complex plasma crystal utilising the mode-coupling instability [36][37][38] (see details in SI 31 ), however, the same could be done using laser heating. 39,40 First, the model fluid system was set up.…”

“…(The latter is also described in detail in the Supporting Information (SI).) To observe mode anticrossing directly, we performed dedicated experiments with a 2D system of charged microparticles in the same manner as previously described. − To prepare the fluid, we melted a 2D complex plasma crystal utilizing the mode-coupling instability − (see details in the SI); however, the same could be done using laser heating. , …”