Effect of finite ion temperature on arbitrary amplitude dust ion acoustic solitary waves in quantum plasma

Abstract

Effect of finite ion temperature on the formation of arbitrary amplitude dust ion acoustic solitary waves in unmagnetized quantum plasma is investigated using the Sagdeev’s potential approach. It is found that the ion temperature significantly affects the region of existence and formation of dust ion acoustic solitary waves in quantum plasma. The investigation shows that the solitary structure ceases to exist when the different parameters, viz., temperature, dust density and the soliton velocity cross certain critical values. It is also found that the presence of ion temperature increases the range of wave Mach number from subsonic to supersonic regime both in presence or absence of dust particle density in unmagnetized quantum plasma.