Transport through strongly correlated triple quantum dot

Strong electron correlations are discussed for the three capacitively coupled quantum dots, each of which is connected to a separate pair of electrodes. The finite-U mean field slave boson approach is used. The analysis is carried out for both repulsive and attractive intra- and inter-dot interactions. Depending on the ratio and the sign of interaction parameters and occupation, either charge ordered states or different spin, spin–charge and charge Kondo resonances arise. •SU(3) and SU(6) charge Kondo effects are predicted.•Charge fluctuations rapidly increase in charge Kondo state.•Transition between SU(6) Kondo state and charge order is foreseen.