MAGNETOTUNNELING THROUGH QUANTUM BOXES IN A STRONG-CORRELATION REGIME

Lateral tunnelling through a quantum box in the presence of a magnetic field is analysed including electron-electron interaction without- an y restriction for the spin configuration. When the Zeeman energy is la rge enough to resolve single-particle degeneracies, we propose a simpl e approach for the dot-lead coupling. In such a case, the linear condu ctance at zero temperature as a function of the Fermi energy in the le ads consists of a set of peaks related to changing by one the electron occupancy in the box. We find that the width of the peak is a single- particle feature, their position depend on all the many-body contribut ions while the height is given by correlation effects. We compute the conductance for several cases finding that correlation effects dominat e the whole process.