Dependence of parallel hole mass on quantum well width, barrier parameters and wave function localization
✍ Scribed by U. Ekenberg; A. Ghiti
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 95 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0749-6036
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✦ Synopsis
It has been argued in the literature that the parallel mass of the uppermost heavy-hole subband in a quantum well would increase with increasing well width because of the decreasing subband separation which would enhance the interaction between the subbands. From numerical calculations with the Luttinger Hamiltonian we find that the opposite trend occurs. We find that wave function penetration into the barriers, where the hole mass is higher, is not the main reason for this trend. We analyze our results with the use of scaling arguments, which are exact for infinitely high barriers. We also discuss the possibility of influencing the parallel mass by separating heavy and light holes spatially and in this way reduce the interaction matrix elements between their wave functions.