Electrical control of a single Mn atom in a quantum dot |
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Authors: | Léger Y Besombes L Fernández-Rossier J Maingault L Mariette H |
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Institution: | CEA-CNRS group Nanophysique et Semiconducteurs, Laboratoire de Spectrométrie Physique, CNRS and Université Joseph Fourier-Grenoble 1, Bo?te Postale 87, F-38402 St. Martin d'Hères, France. |
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Abstract: | We report on the reversible electrical control of the magnetic properties of a single Mn atom in an individual quantum dot. Our device permits us to prepare the dot in states with three different electric charges, 0, +1e, and -1e which result in dramatically different spin properties, as revealed by photoluminescence. Whereas in the neutral configuration the quantum dot is paramagnetic, the electron-doped dot spin states are spin rotationally invariant and the hole-doped dot spins states are quantized along the growth direction. |
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