Effect of dielectric mismatch on impurity binding energy in double ellipsoidal quantum dots
| Autor: | M. Moradi Lm, P. Zamani, E. Sadeghi |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Physics
Condensed matter physics Binding energy Impurity binding energy Dielectric Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Polarization (waves) Ellipsoid Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols.namesake Quantum dot Impurity symbols Bessel function |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 56:113-116 |
| ISSN: | 1386-9477 |
| DOI: | 10.1016/j.physe.2013.08.032 |
| Popis: | The present study seeks to scrutinize the effect of polarization charges on the electronic properties of double ellipsoidal quantum dots. In this regard, the effective-mass approximation within a variational scheme is used and the binding energy of hydrogenic impurity located at the center of ellipsoidal quantum dot (EQD) is calculated for GaAs/GaAlAs/AlAs structure. The effect of surface polarization charges due to impurity and self-polarization charges on the binding energy is considered. The results showed that the binding energy depends not only on the thickness of the intermediate layer but also on the ellipticity constant. |
| Databáze: | OpenAIRE |
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