Direct experimental measurement of the speed-stress relation for dislocations in a plasma crystal

Abstract

The speed-stress relation for gliding edge dislocations was experimentally measured for the first time. The experimental system used, a two-dimensional plasma crystal, allowed observation of individual dislocations at the "atomistic" level and in real time. At low applied stress dislocations moved subsonically, at higher stress their speed abruptly increased to 1.9 times the speed of shear waves, then slowly grew with stress. There is evidence that immediately after nucleation dislocations can move faster than pressure waves.

5 pages, 4 figures

References in corpus (3)

• Direct observation of mode-coupling instability in two-dimensional plasma crystals
• Supersonic dislocations observed in a plasma crystal
• Evolution of shear-induced melting in dusty plasma

Cited by in corpus (10)

• Statistical mechanics for non-reciprocal forces
• Microstructure of a liquid complex (dusty) plasma under shear
• Interparticle attraction in 2D complex plasmas
• Anisotropic shear melting and recrystallization of a two-dimensional complex (dusty) plasma
• Equation of motion and subsonic-transonic transitions of rectilinear edge dislocations: A collective-variable approach
• Channeling of particles and associated anomalous transport in a 2D complex plasma crystal
• Vacancy diffusion in colloidal crystals as determined by dynamical density-functional theory and the phase-field-crystal model
• Causal Stroh formalism for uniformly-moving dislocations in anisotropic media: Somigliana dislocations and Mach cones
• New Solutions for Slow Moving Kinks in a Forced Frenkel-Kontorova Chain
• Effects of collision enhanced charging on dust crystal