Accuracy of Effective Mass Equation for a Single and Double Cylindrical Quantum Dot |
| A. Mielnik-Pyszczorski, K. Gawarecki and P. Machnikowski
Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland |
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| In this contribution we study the accuracy of various forms of electron effective mass equation in reproducing spectral and spin-related features of quantum dot systems. We compare the results of the standard 8 band k·p model to those obtained from effective mass equations obtained by perturbative elimination procedures in various approximtions for a cylindrical quantum dot or a system of two such dots. We calculate the splitting of electronic shells, the electron g-factor and spin-orbit induced spin mixing and show that for a cylindrical dot the g-factor is reproduced very exactly, while for the two other quantities the effective mass equation is much less accurate. |
DOI: 10.12693/APhysPolA.132.376 PACS numbers: 85.75.-d, 03.65.Yz |