Effect of electric field and dot radius on the quantum state energies of an electron confined in a GaAs/Ga x Al 1−x As core shell quantum dot
| Autor: | Bashir Mohi Ud Din Bhat, Rayees Ahmad Zargar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Materials Science (miscellaneous) 02 engineering and technology Electron Electronic structure Radius 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Classical electron radius Quantum dot Electric field Excited state 0103 physical sciences Materials Chemistry Energy level Atomic physics 010306 general physics 0210 nano-technology |
| Zdroj: | Computational Condensed Matter. 12:14-18 |
| ISSN: | 2352-2143 |
| DOI: | 10.1016/j.cocom.2017.06.002 |
| Popis: | In this paper the quantum state energies of an electron confined in a GaAs/GaxAl1−xAs core shell quantum dot were calculated using W.K.B approximation method, in the frame work of the effective mass approximation under external electric field. The study reveals that the electron energies of 1s and 2p states decreases with increase in applied external electric field at a given dot radius. Furthermore the electron energies of the states are found to decrease with increase in dot radius and become appreciably small 30 e V with electric field of strength 5 K V / c m . In addition our results show the effect of shell radius on the electronic structure. For a shell radius R 1 > 5 n m , the ground and first excited state electron energies are negligibly small and approaches to a constant value. We also display the effect of A l concentration on the electron energy levels. The electron energy increases and shows non linear dependence with the increase in A l concentration. The observed results are in agreement with the theoretical results reported in the previous literature. |
| Databáze: | OpenAIRE |
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