Contrôle du ferromagnétisme dans des puits quantiques de CdMnTe réalisés en Epitaxie par Jets Moléculaires.

Abstract : It has been shown that when a two-dimensionnal hole gas is introduced in a semimagnetic semiconductor quantum well, a ferromagnetic phase takes place. We have elaborated structures based on II-VI semiconductors (tellurides), by Molecular Beam Epitaxy, in order to prove that it is possible to control the ferromagnetic transition. This control has been reached through an electric field applied on a pin diode, through an illumination that modify the hole density in a pip structure, and through strain and confinement in the quantum well. We have demonstrated a new way for p-type doping usinf surface acceptor states created by oxidation. We have identified the existing species and shown that the doping is very sensitive to the cap thickness.
Document type :
Theses
Condensed Matter. Université Joseph-Fourier - Grenoble I, 2004. French


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Contributor : Mikael Bertolini <>
Submitted on : Monday, February 7, 2005 - 10:00:00 AM
Last modification on : Monday, February 7, 2005 - 10:00:00 AM

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Mikael Bertolini. Contrôle du ferromagnétisme dans des puits quantiques de CdMnTe réalisés en Epitaxie par Jets Moléculaires.. Condensed Matter. Université Joseph-Fourier - Grenoble I, 2004. French. <tel-00008370>

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