Léger Y, Besombes L, Fernández-Rossier J, Maingault L, Mariette H
CEA-CNRS group Nanophysique et Semiconducteurs, Laboratoire de Spectrométrie Physique, CNRS and Université Joseph Fourier-Grenoble 1, Boîte Postale 87, F-38402 St. Martin d'Hères, France.
Phys Rev Lett. 2006 Sep 8;97(10):107401. doi: 10.1103/PhysRevLett.97.107401. Epub 2006 Sep 7.
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.
我们报道了对单个量子点中单个锰原子磁性质的可逆电控制。我们的装置使我们能够将量子点制备成具有三种不同电荷状态的情况，即0、+1e和-1e，光致发光显示这三种状态会导致截然不同的自旋性质。在中性构型中量子点是顺磁性的，而电子掺杂的量子点自旋态是自旋旋转不变的，空穴掺杂的量子点自旋态则沿生长方向量子化。
