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Abstract
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In this work , we use the conven tional hydrody namics formalism and incorp orate the ChewGoldberg er-Low double-adiaba tic theory to evaluat e the nonli near electrost atic ion excitations in
double-degen erate (electr on spin -orbit degene rate) magnetized quantum plasmas. Based on the
Sagdeev pseudopoten tial method, an exact general pseudopotential is calculated wh ich leads to the
allowed Mach-number range criter ia for such localized densi ty structures in an anisotrop ic
magnetized plasma. We employ the criteria on the Mach-number range for diverse magnetized
quantum plasma with different equatio ns of state. It is remarked that various plasma fractional
parameters such as the system dimension ality, ion-temperature, relativistic-de generacy, Zeemanenergy, and plasma composition are inv olved in the stability of an obliquely propagating nonlinear
ion-acoustic wave in a double-degen erate quantum pla sma. Current study is most appropriate
for nonlinear wave analys is in dense as trophysical magnetized plasma environments such as whitedwarfs and neutron- star cru sts where the strong magnetic fields can be present.
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