Contrôle optique du spin d’un atome magnétique dans un semiconducteur : spin hybride trou-Manganèse et Chrome
Vendredi 26 janvier 2018 10:30
- Duree : 1 heure
Lieu : Salle "Nevill Mott" D420 - 3ème étage, Bât D - Institut Néel - CNRS Polygone scientifique, 25 rue des martyrs, 38000 Grenoble
Orateur : Alban LAFUENTE-SAMPIETRO
Constructing a quantum computer is one of the challenges of this century. The core component of this computer is the qubit, the quantum bits, able to be not only in the states |0> and |1> but also a superposition of those two states. Single spins in semiconductor are a promising system for their realization. In particular, we are interested in single magnetic atom in a quantum dot, a small island of a small gap semiconductor in a wide gap one. Two of those systems are studied in this thesis : a single Mn atom in a positively charged quantum dot, and a single Cr atom in a neutral quantum dot. We show how the spin of these atoms can be probed and controlled optically, and we study their dynamics. It shows that both systems are strongly coupled to phonons and strains. This coupling opens new ways to probe and control the spins of the magnetic atoms, not only optically, but by modulating the strain field at their position."
Contact : lucien.besombes@neel.cnrs.fr
Discipline évènement : (Physique)
Entité organisatrice : (Institut Néel)
Nature évènement : (Soutenance de thèse)
Site de l'évènement : Polygone scientifique
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