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In this paper we investigate the interplay of the Rashba spin-orbit coupling(RSOC) and a topological defect, such as a screw dislocation in an {\alpha}-T3Aharonov-Bohm quantum ring and scrutinized the effect of an external transversemagnetic field therein. Our study reveals that the energy spectrum follows aparabolic dependence on the Burgers vector associated with the screwdislocation. Moreover, its presence results in an effective flux, encompassingthe ramifications due to both the topological flux and that due to the externalmagnetic field. Furthermore, we observe periodic oscillations in the persistentcurrent in both charge and spin sectors, with a period equal to one fluxquantum, which, however suffers a phase shift that is proportional to thedislocation present in the system. Such tunable oscillations of the spinpersistent current highlights potential application of our system to be used asspintronic devices. Additionally, we derive and analyse the thermodynamicproperties of the ring via obtaining the canonical partition function throughEuler-Maclaurin formula. In particular, we compute the thermodynamicpotentials, free energies, entropy, and heat capacity and found the latter toyield the expected Dulong-Petit law at large temperatures.

Properties of an {\alpha}-T3 Aharonov-Bohm quantum ring: Interplay of Rashba spin-orbit coupling and topological defect