Density of states of quantum dots and crossover from 3D to Q0D electron gas
| Autor: | M J Park, S J Lee, N H Shin, J J Ko, R Kummel |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Physics
Condensed matter physics Sawtooth wave Electronic structure Condensed Matter Physics Electronic Optical and Magnetic Materials Schrödinger equation symbols.namesake Quantum dot Materials Chemistry Density of states symbols Finite potential well Work function Electrical and Electronic Engineering Fermi gas |
| Zdroj: | Semiconductor Science and Technology. 7:1072-1079 |
| ISSN: | 0268-1242 |
| DOI: | 10.1088/0268-1242/7/8/008 |
| Popis: | An isolated quantum dot is modelled by a potential box with delta-profiled, penetrable potential walls embedded in a large outer box with infinitely high potential walls which represent the work function with respect to a vacuum. The authors calculate the energies E and the density of states of the electron gas in the quantum dot as functions of the strengths of the potential walls of the inner box. As the strengths of the opposite potential walls increase pairwise from small to large values, the density of states shows smooth crossover from the three-dimensional E1/2 form to the quasi-two-dimensional (Q2D) staircase and further down to the Q1D sawtooth and the delta-function peaks of the Q0D electron gas. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|