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Charge gradient effects on modulated dust lattice wave packets in dusty plasma crystals

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Author(s): M Shahmansouri | B Farokhi

Journal: Iranian Journal of Physics Research
ISSN 1682-6957

Volume: 12;
Issue: 3;
Start page: 267;
Date: 2012;
Original page

Keywords: Dusty plasma crystal | Dust lattice mode | Nonlinear wave | Charge fluctuation | Modulated wave packets

ABSTRACT
  Nonlinear Dust lattice modes are studied in a hexagonal two-dimensional dusty plasma lattice, in presence of charge gradient of dust particles. In this lattice, such gradients affect nonlinear behavior of dust lattice waves. The amplitude modulation of off-plane transverse dust lattice wave packets is investigated considering the anisotropy of interactions, caused by the height-dependent charge variations. A nonlinear Schrodinger equation described time evolution of modulated off-plane transverse dust lattice wave packet. Calculations show that the charge gradient changes the stability condition of the solution of the nonlinear Schrodinger equation.

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