Out-of-Equilibrium Singlet-Triplet Kondo Effect in a Single C60 Quantum Dot

Nicolas Roch (1) , Serge Florens (2) , Vincent Bouchiat (3) , Wolfgang Wernsdorfer (1) , Franck Balestro (1)

1 NEEL - QuantECA - Circuits électroniques quantiques Alpes
2 NEEL - ThQC - Théorie Quantique des Circuits
3 NEEL - Quan2m - Interactions modulables dans des états quantiques 2D

We have used an electromigration technique to fabricate a C60 single-molecule transistor (SMT). Besides describing our electromigration procedure, we focus and present an experimental study of a single molecule quantum dot containing an even number of electrons, revealing, for two different samples, a clear out-of-equilibrium Kondo effect. Low temperature magneto-transport studies are provided, which demonstrates a Zeeman splitting of the finite bias anomaly.

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Nicolas Roch, Serge Florens, Vincent Bouchiat, Wolfgang Wernsdorfer, Franck Balestro. Out-of-Equilibrium Singlet-Triplet Kondo Effect in a Single C60 Quantum Dot. Journal of Low Temperature Physics, 2008, 153, pp.350-358. ⟨10.1007/S10909-008-9840-4⟩. ⟨hal-00700051⟩