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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2010

Dynamical equilibrium between magnetic ions and photocarriers in low Mn-doped single quantum dots

Thomas Clement
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Lucien Besombes
Hervé Boukari
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Henri Mariette

Résumé

For low Mn-doped Cd(Mn)Te/ZnTe single quantum dots, we report a nonlinear behavior of exciton energy as a function of magnetic field, which differs from the usual giant Zeeman effect. This effect is modeled by a positive feedback loop in the heating process of Mn spins by carriers photocreated in the vicinity of the dot. It results in a highly nonlinear and magnetic field dependent Mn spin heating process. This effect prevails when dealing with magnetic dot deposited on a thin two-dimensional layer and containing about 1% Mn. This shows that controlling the coupling between the magnetic dot and its local environment is a corner stone to achieve nanoscale spin manipulation.
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Dates et versions

hal-00996992 , version 1 (27-05-2014)

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Thomas Clement, David Ferrand, Lucien Besombes, Hervé Boukari, Henri Mariette. Dynamical equilibrium between magnetic ions and photocarriers in low Mn-doped single quantum dots. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 81 (15), pp.155328. ⟨10.1103/PhysRevB.81.155328⟩. ⟨hal-00996992⟩

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