Electron-acoustic solitary structures in two-electron-temperature plasma with superthermal electrons |
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| Authors: | H Chen S Q Liu |
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| Institution: | (1) School of Materials Sciences and Engineering, Nanchang University, Nanchang, 330047, P.R. China;(2) School of Sciences, Nanchang University, Nanchang, 330047, P.R. China; |
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| Abstract: | The propagation of nonlinear electron-acoustic waves (EAWs) in an unmagnetized collisionless plasma system consisting of a
cold electron fluid, superthermal hot electrons and stationary ions is investigated. A reductive perturbation method is employed
to obtain a modified Korteweg–de Vries (mKdV) equation for the first-order potential. The small amplitude electron-acoustic
solitary wave, e.g., soliton and double layer (DL) solutions are presented, and the effects of superthermal electrons on the
nature of the solitons are also discussed. But the results shows that the weak stationary EA DLs cannot be supported by the
present model. |
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