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Ferromagnetism in II-VI Based Semiconductor Structures

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Cibert J., Ferrand D., Tatarenko S., Wasiela A., Kossacki P., Dietl T.

Acta Physica Polonica A

2001

vol. 100

issue 2

227-236

The experimental results on carrier-induced ferromagnetic interaction in II-VI diluted magnetic semiconductors are shortly reviewed and analyzed in the light of the mean field approximation. We particularly take the point of view of the experimentalist to emphasize (i) points which are easily understood within this simple model (as the role of the detailed structure of the valence band) and hence should be incorporated into more sophisticated models, and (ii) points which are not taken into account in the mean field model (e.g., disorder effects) and hence call for more elaborate descriptions. We particularly discuss the case of a low carrier density, and show that the situation appears as experimentally very different in the highly disordered 3D layers and in the modulation doped 2D quantum wells.

Excitonic Effects in Linear and Photoinduced Faraday Rotation in Semimagnetic Semiconductors

100%

Leisching P., Pankoke R., Buss C., Frey R., Flytzanis C., Cibert J., Wasiela A.

Acta Physica Polonica A

1997

vol. 92

issue 5

895-898

We investigate the influence of the Coulomb interaction on the giant linear and photoinduced Faraday rotation in the bulk Cd_{1-x}Mn_{x}Te system. Experimental results are presented and discussed by calculating the complex dielectric function. The anisotropy and k-dependence of the magnetic spin-exchange interaction and the Coulomb interaction between optically excited bound and unbound electron-hole pairs are considered using a microscopic theory. At high excitation densities, the excitonic nonlinearities of the 1s transitions are investigated.

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2 Acta Physica Polonica A

1 2001

1 1997

2 Cibert J.

2 Wasiela A.

1 Buss C.

1 Dietl T.

1 Ferrand D.

1 Flytzanis C.

1 Frey R.

1 Kossacki P.

1 Leisching P.

1 Pankoke R.

1 Tatarenko S.

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Ferromagnetism in II-VI Based Semiconductor Structures

Excitonic Effects in Linear and Photoinduced Faraday Rotation in Semimagnetic Semiconductors