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Effect of Magnetic Polaron Formation on the Exciton Mobility Edge in Cd_{1-x}Mn_{x}Te

100%

Mackh G., Yakovlev D., Ossau W., Waag A., Landwehr G.

Acta Physica Polonica A

1995

vol. 87

issue 1

265-268

We study the exciton localization in the semimagnetic semiconductor Cd_{1-x}Mn_{x}Te by selective excitation of the exciton photoluminescence. We show that the energy position of the effective mobility edge for excitons is subject to the competition between nonmagnetic and magnetic localization due to the magnetic polaron formation. External magnetic fields affect this competition by suppressing the polaron formation, which shifts the mobility edge.

Exciton Magnetic Polaron Features in Photoluminescence Excitation Spectra of CdTe/(CdMn)Te Quantum Wells with High Mn Contents

86%

Mackh G., Ossau W., Yakovlev D. R., Landwehr G., Wojtowicz T., Karczewski G., Kossut J.

Acta Physica Polonica A

1995

vol. 88

issue 5

849-852

Exciton magnetic polarons are studied in CdTe/Cd_{1-x}Mn_{x}Te (0.4 ≤ x ≤ 0.8) quantum wells. The magnetic polaron formation leads to the appearance of an additional line in the photoluminescence excitation spectra, which can be employed to determine the Zeeman splittings more exactly than by using the free exciton peak. We find an overall increase in the polaron energy with increasing x in the whole range of Mn contents studied.

Cd_{1-x}Mn_{x}Te Parabolic Quantum Wells

73%

Wojtowicz T., Kutrowski M., Cywiński G., Dynowska E., Karczewski G., Kossut J., Fiederling R., Mackh G., Zehnder U., Ossau W.

Acta Physica Polonica A

1996

vol. 90

issue 5

977-980

We report on the growth and optical studies of II-VI semiconductor parabolic quantum wells made of Cd_{1-x}Mn_{x}Te for a broad range of quantum well widths and Mn molar fractions x. Photoluminescence excitation spectra revealed several series of peaks equidistant in energy associated with interband optical transitions between harmonic oscillator levels. From the analysis of the spectra the valence band offset Q_{hh} = 0.44±0.1 was determined for the CdTe/Cd_{1-x}Mn_{x}Te system.

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3 Acta Physica Polonica A

1 1996

2 1995

3 Mackh G.

3 Ossau W.

2 Karczewski G.

2 Kossut J.

2 Landwehr G.

2 Wojtowicz T.

1 Cywiński G.

1 Dynowska E.

1 Fiederling R.

1 Kutrowski M.

1 Waag A.

1 Yakovlev D.

1 Yakovlev D. R.

1 Zehnder U.

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Effect of Magnetic Polaron Formation on the Exciton Mobility Edge in Cd_{1-x}Mn_{x}Te

Exciton Magnetic Polaron Features in Photoluminescence Excitation Spectra of CdTe/(CdMn)Te Quantum Wells with High Mn Contents

Cd_{1-x}Mn_{x}Te Parabolic Quantum Wells