 |
Ядерна фізика та енергетика
ISSN:
1818-331X (Print), 2074-0565 (Online) |
| Home page | About |
Full text (ua) Quantum wells degradation and modification of energy spectra in semiconductors under irradiation
G. V. Vertsimakha, V. V. Mykhaylovskyy, V. Y. Sugakov
Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
Abstract: The influence of high-energy particles radiation on the spatial distribution of atom concentration in multicomponent semiconductors with quantum wells was considered. The calculations was made for manganese concentration in CdMnTe. The initial distribution of manganese concentration was taken as in Cd1-xMnxTe/CdTe quantum well. Further dynamics was simulated with kinetic equations. Defect creations by irradiation, their recombination and drift to surface as well as manganese diffusion with vacancies and interstitials were taken into account in the kinetic equations. It was shown that irradiation causes the intermixing of compound's components and the quantum well spreading. The influence of external irradiation on the potential for electrons and holes, their spectra and exciton spectra were analyzed. Time dependences of exciton level were calculated for different temperatures and irradiation intensity.
References:1. Jamil N. Y. Shaw D. The diffusion of Mn in CdTe. Semicond. Sci. Technol. 10 (1995) 952. https://doi.org/10.1088/0268-1242/10/7/009
2. Barcz A., Karczewski G., Wojtowicz T., Kossut J. Manganese diffusion in MBE-grown Cd(Mn)Te structures. J. Crystal Growth 159 (1996) 980. https://doi.org/10.1016/0022-0248(95)00840-3
3. Makowski S., Khoi N., Golnik A. et al. Influence of capping on manganese diffusion in CdTe/CdMnTe quantum well structures. Solid State Communications 107 (1998) 267. https://doi.org/10.1016/S0038-1098(98)00233-6
4. Eymery J., Hartmanna J. M., Baumbach G. T. Interface dilution and morphology of CdTe/MnTe superlattices studied by small- and large-angle x-ray scattering. J. Appl. Phys. 87 (2000) 7266. https://doi.org/10.1063/1.372979
5. Grill R., Turjanska L., Franc J. et al. Chemical Self-Diffusion in CdTe. phys. stat. sol. (b) 229 (2002) 161. https://doi.org/10.1002/1521-3951(200201)229:1%3C161::AID-PSSB161%3E3.0.CO;2-3
6. Berding M. A. Native Defects in CdTe. Phys. Rev. B 60 (1999) 8943. https://doi.org/10.1103/PhysRevB.60.8943
7. Bacher G., Kummell T., Eisert D. et al. Buried single CdTe/CdMnTe quantum dots realized by focused ion beam lithography. Appl. Phys. Lett. 75 (1999) 956. https://doi.org/10.1063/1.124565
8. Бургуэн Ж., Ланно М. Точечные дефекты в полупроводниках (Москва: Мир, 1985) 304 с.
9. Лейман К. Взаимодействие излучения с твердым телом и образование элементарных дефектов (Москва: Атомиздат, 1979) 296 с.
10. Денисов С. П. Ионизационные потери энергии заряженных частиц. Соросовский образовательный журнал 11 (1999) 90.
11. Harrison P., Hagston W. E., Stirner T. Excitons in diffused quantum wells. Phys. Rev. B 47 (1993) 16404. https://doi.org/10.1103/PhysRevB.47.16404
12. Мартыненко О. Г., Соковишин Ю. А. Свободно-конвективный теплообмен (Минск: Наука и техника, 1982) 400 с.
13. Greene R., Bajaj K. K., Phelps E. Energy levels of Wannier excitons in GaAs-Ga1-xAlxAs quantum-well structures. Phys. Rev. B 29 (1984) 1807. https://doi.org/10.1103/PhysRevB.29.1807
14. Kuhr-Heinrich B., Popp M., Ossau W. et al. Magneto-optical study of heavy- and light-hole excitons in CdTe/(Cd,Mn)Te single quantum wells. Semicond. Sci. Technol. 8 (1993) 1239. https://doi.org/10.1088/0268-1242/8/7/010
15. Sugakov V. I., Vertsimakha A. V. Effect of Magnetic Impurity Concentration and Spin Projection Fluctuations on Exciton Spectra in Diluted Magnetic Semiconductor Quantum Wells. phys. stat. sol. (b) 209 (1998) 49. https://doi.org/10.1002/(SICI)1521-3951(199809)209:1%3C49::AID-PSSB49%3E3.0.CO;2-9
16. Brubach J., Silov A. Yu., Haverkort J. E. et. al. Carrier capture in ultrathin InAs/GaAs quantum wells. Phys. Rev. B 61 (2000) 16833. https://doi.org/10.1103/PhysRevB.61.16833