Strain and Spin-Orbit Effects in Self-Assembled Quantum Dots

• Authors: M. Zieliński , W. Jaskólski , J. Aizpurua , G. Bryant
• Languages of publication: EN

Abstracts

EN

The effects of strain and spin-orbit interaction in self-assembled lens-shaped InAs/GaAs quantum dots are investigated. Calculations are performed with empirical tight-binding theory supplemented by the valence force field method to account for effects of strain caused by lattice mismatch at the InAs-GaAs interface. It is shown that both effects influence strongly the electron and hole energy structure: splitting of the energy levels, the number of bound states, density distributions, and transition rates. We show that piezoelectric effects are almost negligible in quantum dots of the size investigated.

Keywords

EN

71.35.Cc

Discipline

• 71.35.Cc: Intrinsic properties of excitons; optical absorption spectra

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 5
• Pages: 929-940

Dates

published

2005-11

received

2005-06-04

Contributors

author

M. Zieliński

• Instytut Fizyki UMK, Grudziądzka 5, 87-100 Toruń, Poland

author

W. Jaskólski

• Instytut Fizyki UMK, Grudziądzka 5, 87-100 Toruń, Poland

author

J. Aizpurua

• Donostia International Physics Center, 20018 San Sebastian, Spain

author

G. Bryant

• National Institute of Standards and Technology, Gaithersburg, MD 20899-8423, USA

References

• 1. M. Grundmann, Physica E, 5, 167, 1999
• 2. D. Bimberg, M. Grundmann, N.N. Ledentsov, Quantum Dot Heterostructures, Wiley, New York 1999
• 3. M. Bayer, P. Hawrylak, K. Hinzer, S. Fafard, M. Korkusinski, Z.R. Wasilewski, O. Stern, A. Forchell, Science, 291, 451, 2001
• 4. G. Bester, J. Shumway, A. Zunger, Phys. Rev. Lett., 93, 047401, 2004
• 5. R. Santoprete, Belita Koiller, R.B. Capaz, P. Kratzer, Q.K.K. Liu, M. Scheffler, Phys. Rev. B, 68, 235311, 2003
• 6. S. Lee, F. Oyafuso, P. von Allmen, G. Klimeck, Phys. Rev. B, 69, 045316, 2004
• 7. O. Stier, M. Grundmann, D. Bimberg, Phys. Rev. B, 59, 5688, 1999
• 8. G. Bester, A. Zunger, Phys. Rev. B, 71, 045318, 2005
• 9. Landolt-Bornstein, Numerical Data and Functional Relationships in Science and Technology, Ed. O. Madelung, Springer-Verlag, Berlin 1982
• 10. T.B. Boykin, G. Klimeck, R.C. Bowen, F. Oyafuso, Phys. Rev. B, 66, 125207, 2002
• 11. G.W. Bryant, W. Jaskólski, Phys. Rev. B, 67, 205320, 2003
• 12. S. Fafard, M. Spanner, J.P. McCaffrey, Z.R. Wasilewski, Appl. Phys. Lett., 76, 2268, 2000
• 13. T. Hanada, T. Yao, Microel. J., in press
• 14. P. Vogl, H.P. Hjalmarson, J.D. Dow, J. Phys. Chem. Solids, 44, 365, 1983
• 15. W. Jaskólski, M. Zieliński, G.W. Bryant, Acta Phys. Pol. A, 106, 193, 2004
• 16. S. Lee, O.L. Lazarenkova, P. von Allmen, F. Oyafuso, G. Klimeck, Phys. Rev. B, 70, 125307, 2004
• 17. C. Pryor, J. Kim, L.W. Wang, A.J. Williamson, A. Zunger, J. Appl. Phys., 83, 2548, 1998
• 18. T. Saito, Y. Arakawa, Physica E, 15, 169, 2002
• 19. W.H. Press, B.P. Flannery, S.A. Teukolsky, W.T. Vetterling, Numerical Recipes, Cambridge University Press, Cambridge 1986
• 20. J.C. Slater, G.F. Koster, Phys. Rev., 94, 1498, 1954
• 21. G. Klimeck, R.C. Bowen, T.B. Boykin, T.A. Cwik, Superlattices Microstruct., 27, 519, 2000
• 22. S. Fraga, J. Muszyńska, Atoms in External Fields, Elsevier, New York 1981
• 23. J.P. Loehr, Physics of Strained Quantum Well Lasers, Kluwer, Boston 1998

Identifiers

DOI

10.12693/APhysPolA.108.929