Abstract
The influence of the direct and exchange Coulomb interaction on Landau
level formation in strain induced QD has been studied by high‐field (45
T) magneto‐luminescence measurements and by many‐electron many‐hole
Hartree‐Fock calculations. At high magnetic fields the degeneracy of the
QD electron and hole ground states is increased as several zero‐field
eigenstates merge into the lowest Landau level. This leads to removal of
the state filling and accordingly in high magnetic field the QD
luminescence is emitted from the lowest Landau level. Using a
generalization of Koopmans theorem for electron–hole many particle
systems, we have studied the enhancement of the direct and exchange
Coulomb interaction in squeezed carrier states. The results show that
for 6 to 8 electron–hole pairs the direct and exchange interaction both
reduce the diamagnetic shift by 15 to 25%.
| Original language | English |
|---|---|
| Pages (from-to) | 263 - 268 |
| Number of pages | 6 |
| Journal | Physica Status Solidi A: Applied Research |
| Volume | 178 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2000 |
| MoE publication type | A1 Journal article-refereed |