Abstract
This paper provides a theoretical investigation of the binding energy \(E_{{\text{b}}}\) and self-polarization of a hydrogenic shallow donor impurity located in a \({\text{GaAs}} - {\text{Ga}}_{1 - x} {\text{Al}}_{x} {\text{As}}\) double quantum dot under the influence of the spatial electric field. The variational approach within the effective mass approximation is used to solve the Schrödinger equation. The main contributions reveal that the effect of the spatial electric field on the impurity binding energy is less presented compared to the applied electric field in the x-direction. Also, the binding energy and the self-polarization are significantly affected by the spatial electric field strength \(\left( F \right)\), the impurity position \(\left( {x_{0} } \right)\), and the barrier width. In the absence of the spatial electric field, the self-polarization is an odd function with respect to the barrier center having two small peaks. Moreover, our findings show that for different impurity locations, the angles of the spatial electric field components θ and φ affect dramatically the binding energy.
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The corresponding author will provide all the files in case they are requested. This manuscript has associated data in a data repository. [Authors’ comment: The comments in this section are summaries of the findings reached from all of the research included in the ‘Results and Discussions’ section and do not arise from earlier work, thus no citations are required.]
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Arraoui, R., Sali, A., Ed-Dahmouny, A. et al. The spatial electric field effect on the impurity binding energy and self-polarization in a double quantum dot. Eur. Phys. J. Plus 137, 979 (2022). https://doi.org/10.1140/epjp/s13360-022-03193-6
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DOI: https://doi.org/10.1140/epjp/s13360-022-03193-6