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In this paper, we investigate the influence of a screw dislocation on theenergy levels and the wavefunctions of an electron confined in atwo-dimensional pseudoharmonic quantum dot under the influence of an externalmagnetic field inside a dot and Aharonov-Bohm field inside a pseudodot. Theexact solutions for energy eigenvalues and wavefunctions are computed asfunctions of applied uniform magnetic field strength, Aharonov-Bohm flux,magnetic quantum number and the parameter characterizing the screw dislocation,the Burgers vector. We investigate the modifications due to the screwdislocation on the light interband absorption coefficient and absorptionthreshold frequency. Two scenarios are possible, depending on if singulareffects either manifest or not. We found that as the Burgers vector increases,the curves of frequency are pushed up towards of the growth of it. Oneinteresting aspect which we have observed is that the Aharonov-Bohm flux can betuned in order to cancel the screw effect of the model.

Landau quantization, Aharonov-Bohm effect and two-dimensional pseudoharmonic quantum dot around a screw dislocation