Out-of-equilibrium singlet-triplet Kondo effect in a single C_60 quantum dot

TL;DR

This paper reports the observation of an out-of-equilibrium singlet-triplet Kondo effect in a single C60 molecule quantum dot, fabricated via electromigration, with detailed magneto-transport measurements showing Zeeman splitting.

Contribution

It presents the first experimental demonstration of out-of-equilibrium Kondo effects in a single-molecule C60 quantum dot with detailed fabrication and measurement procedures.

Findings

Observation of out-of-equilibrium Kondo effect in C60 quantum dot

Zeeman splitting of the finite bias anomaly observed

Demonstration of Kondo physics in single-molecule transistors

Abstract

We have used an electromigration technique to fabricate a $\rm{C_{{60}}}$ 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.