Density waves at the interface of a binary complex plasma

Abstract

Density waves were studied in a phase-separated binary complex plasma under microgravity conditions. For the big particles, waves were self-excited by the two-stream instability, while for small particles, they were excited by heartbeat instability with the presence of reversed propagating pulses of a different frequency. By studying the dynamics of wave crests at the interface, we recognize a "collision zone" and a "merger zone" before and after the interface, respectively. The results provide a generic picture of wave-wave interaction at the interface between two "mediums".

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• Experimental study of nonlinear dust acoustic solitary waves in a dusty plasma
• Dynamics of lane formation in driven binary complex plasmas
• The equilibrium intrinsic crystal-liquid interface of colloids
• Anomalous transparency of water-air interface for low-frequency sound
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