The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 12 3 2019 11 26 Charge gradient effects on modulated dust lattice wave packets in dusty plasma crystals Charge gradient effects on modulated dust lattice wave packets in dusty plasma crystals 267 267 994 FA M Shahmansouri B Farokhi Journal Article 2019 11 26   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.   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. https://ijpr.iut.ac.ir/article_994_934815ad542a4a7c5e8a2dfa04fea9f5.pdf