Influence of Cairns–Tsallis distribution on double layers in magnetoplasma

Double layers associated with coupled ion-acoustic and drift modes are addressed in an inhomogeneous collision-less electron–ion magnetoplasma with Cairns–Tsallis velocity distribution, in the presence of stationary dust. The formation of double layers and their salient features are investigated by using Sagdeev potential technique. Further the effects of dust concentration, nonthermality and non-extensivity on double layers structure are studied. It is observed that the characteristics of nonlinear structures, i.e., double layers, are significantly modified in the presence of dust and superthermal particles.