Noise in superconductor-quantum dot-normal metal structures in the Kondo regime

Pierre Devillard (1, 2) , Adeline Crépieux (1, 2)

1 CPT - Centre de Physique Théorique - UMR 6207
2 CPT - Centre de Physique Théorique - UMR 7332

We consider a N-dot-S junction in the Kondo regime in the limit where the superconducting gap is much smaller than the Kondo temperature. A generalization of the floating of the Kondo resonance is proposed and many body corrections to the average subgap current are calculated. The zero frequency noise is computed and the Fano factor sticks to the value $10/3$ for all voltages below the gap. Implications for finite frequency noise are briefly discussed.

Mots clés: Kondo effect Superconductivity Quantum dots Noise

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]; Electrons fortement corrélés [cond-mat.str-el]

Pierre Devillard, Adeline Crépieux. Noise in superconductor-quantum dot-normal metal structures in the Kondo regime. 2009. ⟨hal-00440732⟩