Electronic states of on- and off-center donors in quantum rings of finite width
| Autor: | R.P.A. Lima, Mario Amado |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Absorption spectroscopy
Chemistry Oscillator strength Biophysics Perturbation (astronomy) General Chemistry Condensed Matter Physics Biochemistry Atomic and Molecular Physics and Optics Electronic states Magnetic field symbols.namesake Quantum mechanics Perpendicular symbols Atomic physics Hamiltonian (quantum mechanics) Quantum |
| Zdroj: | Journal of Luminescence. 128:858-861 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2007.11.022 |
| Popis: | The electronic states of a hydrogenic donor in two-dimensional quantum rings are calculated by taking into account the finite width of the potential well in the ring. In addition, a strong magnetic field is applied perpendicular to the quantum ring. Using the effective-mass approximation at the Γ valley, the radial Hamiltonian for the envelope-function is exactly diagonalized in the case of on-center donors. The corresponding energy levels for different angular momenta are studied as a function of the applied magnetic field. In the case of off-center donors, a perturbation approach is considered and its limitations are discussed. Finally, we calculate the absorption spectra and oscillator strength for different intraband transitions, specifically for on-center donors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect