This study presents a comprehensive analysis of the elliptic flow coefficient, $v_2$, for charged hadrons at midrapidity in $d+\mathrm{Au}$ collisions at $\sqrt{s_{NN}}=200\mathrm{GeV}$. Utilizing a multiphase transport (AMPT) model in both default and string melting modes, we examine the dependence of $v_2$ on transverse momentum, collision centrality, and particle type. Furthermore, we present $v_2$ across different collision centralities in $d+\mathrm{Au}$ collisions at $\sqrt{s_{NN}}=200\mathrm{GeV}$ within the AMPT model with the string melting mode. Our results indicate that the early-stage partonic phase significantly influences $v_2$, as observed by variations in parton scattering cross section. We also studied the effect of final-state hadronic interactions on $v_2$ by varying the hadronic cascading time. Comparisons with STAR and PHENIX experimental data show that the AMPT model effectively captures the transverse momentum dependence of $v_2$, underlining the importance of parton scattering mechanisms and the need for careful interpretation of experimental results in asymmetric systems.

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• Collective flow
• Relativistic heavy-ion collisions