Electron spin redistribution in a Kondo quantum dot in the low-magnetic-field regime

We observe an alternation of high and low valley conductance regions as a function of magnetic field for constant electron number in a Kondo quantum dot. The valley conductance also alternates between high and low as a function of electron number at constant magnetic field. Full 3D spin density functional calculations of our device quantitatively explain this behaviour in terms of a spatial redistribution of the electron spins in the dot. The spin density functional calculations provide a connection between the many-body state of the Kondo effect on the one hand, and the detailed electronic structure of our nanoscale device on the other hand.