초록 close

The conductance across a quantum dot can be inuenced by levels localized in the dot and having little hybridization with the con-duction channel. Fano lineshapes arising in resonant transmission measurements, imply interference between the localized and extendedstates. By applying a magnetic orthogonal eld, the total spin of a quantum dot can be tuned. Electron correlations drive the dot throughmagnetic eld induced level degeneracy. In a previous work [P. Stefan´ski, A. Tagliacozzo, B.R. Bulka, Phys. Rev. Lett. 93 (2004) 186805]we have shown that a Fano-like pattern also appears when the continuum of the conduction states originates from a broad Kondo res-onance. A bunch of localized core levels, weakly coupled to the Kondo resonance, imprints the broad Kondo peak with Fano lineshapes.A signature of the presence of correlations in the quantum dot is discussed.