Abstract
Arbitrary amplitude dust-acoustic (DA) solitary waves in an unmagnetized and collisionless quantum dusty plasma comprising cold dust particles, kappa (κ)-distributed ions and degenerate electrons are investigated. The influence of suprathermality and quantum effects on the linear dispersion relation of DA waves is investigated. Then, the effect of κ-distributed ions and degenerate electrons on the existence domain of solitons is discussed in the space of (M, f). The comparison of the existence domain for higher and lower values of κ shows that suprathermality results in propagation of solitons with lower Mach number, and the quantum effects, lead to a higher values of Mach number. The existence domain of solitons for nondegenerate κ-distributed electrons is considered for comparison with effect of degenerate electrons. Also, we found that the Sagdeev potential well becomes deeper and wider as ε F − i decreases, as for lower κ values, the influence of quantum effects on the Sagdeev pseudopotential profile is smaller.
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Shahmansouri, M. Dust-acoustic solitons in quantum plasma with kappa-distributed ions. Pramana - J Phys 80, 295–306 (2013). https://doi.org/10.1007/s12043-012-0465-4
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DOI: https://doi.org/10.1007/s12043-012-0465-4