Spintronique (multi-base)

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(Cd,Mn)Te quantum wells and control of a 2D hole gas density: spectroscopy and magnetic properties

Identifieur interne : 004E71 ( Main/Exploration ); précédent : 004E70; suivant : 004E72

(Cd,Mn)Te quantum wells and control of a 2D hole gas density: spectroscopy and magnetic properties

Auteurs : Hervé Boukari [France]

Source :

Mots-clés :

Abstract

This work takes place in the wide field of research for materials and structures presenting suitable properties for future possible application in spintronics. Diluted magnetic semiconductors are good candidates for the simultaneous control of the charge and the spin of electrons or holes. We take advantage of the possibility to fully spin polarize, at small magnetic field, a 2D hole gas in a nitrogen modulated doped (Cd,Mn)Te quantum well. We focus on the identification of the energy levels involved in photoluminescence, as well as on the determination of the characteristic energies (the binding energy of the positively charged exciton, excitations of the hole gas, the spin splitting needed to fully polarize the gas) as a function of the hole density and the magnetic field. We also demonstrate that the magnetization of a (Cd,Mn)Te quantum well, which is inserted in a pin diode, can be switched on and of by an applied bias voltage.


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