Large-amplitude dust acoustic solitons in an opposite polarity dusty plasma with generalized polarization force

Linear and nonlinear dust acoustic (DA) waves have been investigated in an opposite polarity dusty plasma comprising negatively and positively charged dust grains, Maxwellian electrons and ions, including the generalized polarization force effect. The properties of linear DA waves have been significantly altered by the dual dust polarity and polarization force. Large amplitude DA solitons have been discussed in the framework of the Sagdeev potential technique. Our results show that both rarefactive and compressive solitons can exist in such a dusty plasma. The basic features of the Sagdeev potential have been examined under the effect of the polarization force parameter R, the ratio of the charge number of the positive dust to that of the negative dust Z, and the Mach number M. The results show that these parameters play a significant role in determining the region of existence of large amplitude DA solitons.

Automated summary

This study investigates the linear and nonlinear dust acoustic (DA) waves in a dusty plasma with opposite polarity dust grains, Maxwellian electrons and ions, including the generalized polarization force effect. The results show that dual dust polarity and polarization force significantly alter the properties of the linear DA waves. Large amplitude DA solitons are discussed using the Sagdeev potential technique, and it is found that both rarefactive and compressive solitons can exist in such a dusty plasma. The study also examines the influence of the polarization force parameter R, the ratio of the charge number of positive dust to negative dust Z, and the Mach number M on the properties of the Sagdeev potential, and the results demonstrate that these parameters play a significant role in determining the region of existence of large amplitude DA solitons.