Modulational instability and localized excitations of dust-ion acoustic waves

Ioannis Kourakis, P.K. Shukla

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)


Theoretical and numerical studies are carried out of the nonlinear amplitude modulation of dust-ion acoustic waves propagating in an unmagnetized weakly coupled plasma comprised of electrons, positive ions, and charged dust grains, considering perturbations oblique to the carrier wave propagation direction. The stability analysis, based on a nonlinear Schrodinger-type equation, exhibits a wide instability region, which depends on both the angle theta between the modulation and propagation directions and the dust number density n(d). Explicit expressions for the instability increment and threshold are obtained. The possibility and conditions for the existence of different types of localized excitations are also discussed. (C) 2003 American Institute of Physics.
Original languageEnglish
Pages (from-to)3459-3470
Number of pages12
JournalPhysics of Plasmas
Volume10 (9)
Issue number9
Publication statusPublished - Sept 2003

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics


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