Abstract
The dispersion relation and the growth rate of a dust ion-acoustic wave propagating in a complex superthermal plasma containing elongated and rotating dust particles are kinetically investigated by employing Vlasov–Maxwell equations. The negatively charged dust particles are assumed to rotate around an axis perpendicular to the direction of elongation. The condition for an unstable dust ion-acoustic wave is obtained in terms of the rotation frequency and the wave number. In the low frequency regime, the growing mode of the wave is found to be enhanced by the increase in dust particle rotation frequency. However, the dust charge state does not affect the growth rate so much, especially in the high δ = ni0/ne0 regime.
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