Abstract
Theoretical and numerical investigations are presented for the oblique modulation of electron acoustic (EA) waves in three-component plasma consisting of cold electrons, superthermal hot electrons and stationary ions. To study the stability criteria of waves, the nonlinear Schrödinger equation (NLSE) is derived. Analytical and numerical calculations of the NLSE show the variation of the stability region with different plasma parameters. This reveals that the stability criteria of EA waves depend on the modulation angle θ. The effect of the superthermal parameter κ and electron temperature ratio σ on the formation of EA wave envelope excitations is also discussed.
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