Ivchenko, E. L. and Kaminski, A. Yu. and Rössler, Ulrich (1996) Heavy-light hole mixing at zinc-blende (001) interfaces under normal incidence. PHYSICAL REVIEW B, 54 (8). pp. 5852-5859. ISSN 0163-1829
Full text not available from this repository.Abstract
The reduced point symmetry C-2v of a zinc-blende-based (001) interface allows mixing between heavy- and light-hole states even under normal incidence. We have generalized the envelope function approximation to take into account such a mixing by including off-diagonal terms into boundary conditions for the envelopes. The normal off-diagonal hole reflection from a GaAs/AlAs(001) heterointerface as well as Gamma-point interband matrix elements in GaAs/AlAs multilayered structures have been calculated and the results have been compared with those obtained by pseudopotential and tight-binding calculations. The best fit with the numerical calculations gives for the dimensionless heavy-light hole mixing coefficient values t(l-h)=0.9 and 0.32. The theory of exchange splitting of excitonic levels in type II GaAs/AlAs superlattices has been extended to include not only the heavy-light hole mixing but also an admixture of spin-orbit-split states in the heavy-hole wave function. An agreement between theory and experiment for the anisotropic exchange splitting has been achieved for t(l-h)=0.5 A tight-binding model has been used to relate the microscopic parameters with coefficients in the boundary conditions for the hole envelope function. The tight-binding model estimation of t(l-h)=0.44 is in reasonable agreement with the other estimations of t(l-h).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | II GAAS/ALAS SUPERLATTICES; QUANTUM-WELLS; EXCITED-STATES; SEMICONDUCTOR SUPERLATTICES; ELECTRONIC-STRUCTURE; OPTICAL-TRANSITIONS; MAGNETIC-FIELD; FINE-STRUCTURE; GAAS-GA1-XALXAS; PHOTOLUMINESCENCE |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Ulrich Rössler |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Jun 2023 07:05 |
| Last Modified: | 29 Jun 2023 07:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51547 |
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