Abstract
A nonlinear Schrödinger equation is derived to investigate the modulational instability of ion-acoustic (IA) waves (IAWs) in a double pair plasma system containing adiabatic positive and negative ion fluids along with super-thermal electrons and positrons. The analytical analysis predicts two types of modes, viz., fast ( ) and slow ( ) IA modes. The possible stable and unstable parametric regions for the IAWs in the presence of external perturbation can be observed for both and . The number density of the negative ions and positrons plays a vital role in generating the IA rogue waves in the modulationally unstable region. The applications of our present work in astrophysical environments [viz., D-region (H , O ) and F-region (H , H ) of the Earth's ionosphere] and in laboratory plasmas [viz., pair-ion fullerene (C , C )] are pinpointed.
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