Skip to main content Accessibility help
×
Home

D Impurities in a Quasi-Two-Dimensional System: Statistics and Screening

  • W. J. Li (a1), J. L. Wang (a1), J.-P. Cheng (a2), S. Holmes (a3), Y. J. Wang, B. D. Mccombe (a1) and W. Schaff (a4)...

Abstract

Far infrared spectroscopic studies of electron-density- and magnetic-field-dependenceof manyelectron effects on silicon donor impurities confined in GaAs quantum wells are presented. At low excess electron densities, transitions from D singlet and triplet states are observed. Temperature- and polarization-dependence measurements show that the relative absorption strengths of various spectroscopic features (D0, D, and CR) are in qualitative agreement with a statistical calculation in thermal equilibrium in high magnetic fields. At large excess electron densities, the “D” transition energy shifts to higher energy when electron density is increased, and the magnetic-field dependence of the transition energy exhibits discontinuities in slope at integer filling factors. The spectroscopic features and their relation to excess free carriers and the role of screening and correlation are presented and discussed.

Copyright

References

Hide All
1. Huant, S., Najda, S. P., and Etienne, B., Phys. Rev. lett. 65, 1486 (1990); R. Mueller, D. M. Larsen, J. Waldman, and W. D. Goodhue, Phys. Rev. Lett. 68, 2204 (1992);
2. Holmes, S., Cheng, J.-P., and McCombe, B. D., Phys. Rev. Lett. 69, 2571 (1992).
3. See e.g.,Ando, T., Fowler, A. B., and Stern, F., Rev. Modern Phys. 54, 437 (1982); J. A. Brum, G. Bastard, And C. Guillemot, Phys. Rev. B 30, 905 (1984); C. Guilemot, Phys. Rev. B 31, 1428 (1985); A. Gold, A. Phys. B 74, 53 (1988); U. Wulf, V. Gudmundsson, and R. R. Gerhardts, Phys. Rev. B 38, 4218 (1988).
4. Ando, T. and Uemura, Y., J. Phys. Soc. Jpn. 37, 1044 (1974).
5. Kohn, W., Phys. Rev. 123, 1242 (1961).
6. See e.g., Schlesinger, Z., Allen, S. J., Hwang, J. C., Platzman, P. M., and Tzoar, N., Phys. Rev. B 30, 435 (1984); J.-P. Cheng and B. D. McCombe, Phys. Rev. lett. 64, 3177 (1990).
7. Cheng, J.-P., Wang, Y. J., McCombe, B. D., and Schaff, W., Phys. Rev. Lett. 70, 489 (1993).
8. Hawrylak, P., Solid State Commun., submitted, 1993.
9. Hawrylak, P., preprint, 1993.
10. MacDonald, A. H., Solid State Commun. 84, 109 (1992).
11. Dzyubenko, A. B., Phys. Lett. A165, 357 (1992).
12. Greene, R. L., and Bajaj, K. K., Phys. Rev. B 31, 913 (1985).
13. Larsen, D. M., Phys. Rev. B, 20, 5217 (1979).
14. Dzyubenko, A. B., JETP Lett. 57, 507 (1993).
15. Pang, T., and Louie, S. G., Phys. rev. lett. 65, 1635 (1991).

D Impurities in a Quasi-Two-Dimensional System: Statistics and Screening

  • W. J. Li (a1), J. L. Wang (a1), J.-P. Cheng (a2), S. Holmes (a3), Y. J. Wang, B. D. Mccombe (a1) and W. Schaff (a4)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed