Mode coupling and resonance instabilities in quasi-two-dimensional dust clusters in complex plasmas

Abstract

Small quasi-two-dimensional (2D) dust clusters consisting of three to eleven particles are formed in an argon plasma under varying rf power. Their normal modes are investigated through their mode spectra obtained from tracking thermal motion of the particles. Detailed coupling patterns between their horizontal and vertical modes are detected for particle numbers up to seven and discrete instabilities are found for dust clusters with particle number greater than nine, as predicted in previous theory on ion-flow induced mode coupling in small clusters. The instabilities are proven to be induced by resonance between coupled horizontal and vertical normal modes.

9 pages, 4 figures

References in corpus (9)

• Direct observation of mode-coupling instability in two-dimensional plasma crystals
• Vertical pairing of identical particles suspended in the plasma sheath
• Wave mode coupling due to plasma wakes in two-dimensional plasma crystals: In-depth view
• Mode couplings and resonance instabilities in dust clusters
• Structural phase transitions and out-of-plane dust lattice instabilities in vertically confined plasma crystals
• Effect of strong wakes on waves in two-dimensional plasma crystals
• A Simple Method to Measure the Interaction Potential of Dielectric Grains in a Dusty Plasma
• Vibrational Modes and Instabilities of a Dust Particle Pair in a Complex Plasma
• Probing the sheath electric field with a crystal lattice by using thermophoresis in dusty plasma

Cited by in corpus (10)

• Dust charging in dynamic ion wakes
• Structural correlations in diffusiophoretic colloidal mixtures with nonreciprocal interactions
• Continuous and Discontinuous Transitions in the Depinning of Two-Dimensional Dusty Plasmas on a One-Dimensional Periodic Substrate
• Directional Locking in a 2D Yukawa Solid Modulated by a 2D Periodic Substrate
• Phonon spectra of a two-dimensional solid dusty plasma modified by two-dimensional periodic substrates
• Superlubric-pinned transition of a two-dimensional solid dusty plasma under a periodic triangular substrate
• Quasi-two-dimensional complex plasma containing spherical particles and their binary agglomerates
• Evolution of Ion Wake Characteristics with Experimental Conditions
• Dynamical commensuration effect in a two-dimensional Yukawa solid modulated by periodic substrates
• Ion wake induced mode coupling in a horizontal chain in complex plasmas