Effect of Magnetic Field and Shell Thickness on Binding Energies of a ZnSe/ZnS Core Shell Quantum Dot
| Autor: | Pratima Sen, Bashir Mohi Ud Din Bhat, Muhammad Shunaid Parvaiz |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Solid-state physics Condensed matter physics Binding energy Shell (structure) 02 engineering and technology Electronic structure 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Magnetic field Core (optical fiber) Variational method Quantum dot Materials Chemistry Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Journal of Electronic Materials. 46:967-970 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-016-5020-5 |
| Popis: | We investigated the effect of external magnetic field and shell thickness on the binding energies of a ZnSe/ZnS core shell quantum dot. The binding energies were calculated using the variational method within the effective mass approximation and confinement potential. The binding energy of the 2s and 2p+ states was found to increase with magnetic field. However, the 2p0 state was found to be independent of the magnetic field at a shell thickness of 0.5 nm. Degeneracy of the lifted 2p states was found to occur. The results also showed that the electron binding energy increases at the outset with the increasing shell thickness, and at larger shell thicknesses, the binding energy saturates. The binding energy was found to be decreasing with increasing core diameter and becomes appreciably smaller at core radius of 0.42 nm. The observed results were compared with the previously reported results. |
| Databáze: | OpenAIRE |
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