Abstract
In this paper, the nonlinear ion acoustic rogue waves (IARWs) are investigated in an unmagnetized, collisionless plasma which consist of positive ions, superthermal electrons and positrons, respectively. A nonlinear Schrödinger equation (NLSE) of IAW packets has been obtained by using the reductive perturbation technique. Furthermore, the effects of superthermal electrons and positrons on the nonlinear dispersion relation, the group velocity and the modulational instability of nonlinear ion acoustic wave (IAW) packets have been studied in detail. At the same time, the characteristics of first- and second-order IARW also have been discussed. It seems that there is some significant influence of superthermal electrons and positrons on the nonlinear ion acoustic waves. Meanwhile, it is also found that the first- and second-order IARW consisting of Peregrine breathers can be excited by using the modulational instability in this system.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos.11205124, 11565022, 11365020) and the Natural Science Foundation of Northwest Normal University (Grant Nos. NWNU-LKQN-14-9).
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Lin, M.M., Yu, T.X., Wen, H.S. et al. Nonlinear ion acoustic rogue waves in a superthermal electron–positron–ion plasma . Indian J Phys 96, 233–241 (2022). https://doi.org/10.1007/s12648-020-01947-5
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DOI: https://doi.org/10.1007/s12648-020-01947-5