Effects of Electron Temperature on Ion-Acoustic Solitons and Double Layers in Nonextensive Plasmas

Using the Sagdeev potential technique and fluid plasma equations, nonlinear ion-acoustic solitary waves in the presence of thermal fluid ions and two-temperature nonextensive electrons are studied. The existence domain of solitons with respect to electron concentrations and electron temperatures are determined, and it is found that opposite polarity solitons are exist in the given plasma system. Using these results, the effect of cold-to-hot electron temperatures on the characteristics of the large amplitude ion-acoustic solitary waves as well as ion-acoustic double-layers is investigated. Further, it is shown that both compressive and rarefactive solitons coexist in such a plasma system. Finally, the results are compared with the results of similar Maxwellian plasma.