| 1. |
- Ivanov, VY, et al.
(författare)
-
Microwave-induced delocalization of excitons in ternary compounds of II-VI and III-V semiconductors
- 2003
-
Ingår i: Acta Physica Polonica. A. - 0587-4246 .- 1898-794X. ; 103:6, s. 559-566
-
Tidskriftsartikel (refereegranskat)abstract
- In this work we employ technique of optically detected cyclotron resonance for evaluation of the role of localization processes in CdTe/CdMnTe and CdMnTe/CdMgTe quantum well structures. From microwave-induced changes of excitonic emissions we evaluate magnitude of potential fluctuations (Stokes shift), correlate optically detected cyclotron resonance results with the results of time-resolved experiments and discuss nature of recombination processes in the limit of a strong localization.
|
|
| 2. |
- Lee, S., et al.
(författare)
-
Effect of be doping on the properties of GaMnAs ferromagnetic semiconductors
- 2003
-
Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 93:10 3, s. 8307-8309
-
Tidskriftsartikel (refereegranskat)abstract
- The effect of Be doping on the properties of GaMnAs ferromagnetic semiconductors was analyzed. The samples were characterized using SQUID and magnetotransport measurements. The observed increase in the critical temperature in Ga 1-xMn xAs for the low range of x can be explained by the increase of free carrier concentrations in the system arising from Be doping.
|
|
| 3. |
- Godlewski, M., et al.
(författare)
-
Quasi-zero-dimensional excitons in quantum well structures of CdTe/CdMnTe
- 2000
-
Ingår i: Journal of Crystal Growth. - 0022-0248 .- 1873-5002. ; 214, s. 420-423
-
Tidskriftsartikel (refereegranskat)abstract
- In this work we discuss properties of excitons in quantum well structures of CdTe/CdMnTe. We analyse exciton-phonon interaction of strongly localised excitons by studying the temperature dependence of photoluminescence (PL) (width and spectral position of PL lines) and PL dynamics. Evidence of a slow exciton migration/tunnelling among localised sites is presented and its effect on the luminescence spectrum and exciton dynamics is discussed. We show that strong localisation of excitons, observed at low temperatures, results in quasi-zero-dimensional nature of excitons.
|
|
