Kondo effects in a C_60 single-molecule transistor

TL;DR

This study investigates Kondo effects in a C60 single-molecule transistor across various temperatures and magnetic fields, revealing spin-1/2 Kondo phenomena and Zeeman splitting in different electron configurations.

Contribution

The paper provides the first comprehensive experimental analysis of Kondo effects in a C60 SMT, including temperature and magnetic field dependence with theoretical agreement.

Findings

Observation of spin-1/2 Kondo effect in odd-electron C60 SMTs

Zeeman splitting of zero-bias anomaly at low energies in even-electron C60 SMTs

Good agreement between experimental results and theoretical models

Abstract

We have used the electromigration technique to fabricate a $\rm{C_{{60}}}$ single-molecule transistor (SMT). We present a full experimental study as a function of temperature, down to 35 mK, and as a function of magnetic field up to 8 T in a SMT with odd number of electrons, where the usual spin-1/2 Kondo effect occurs, with good agreement with theory. In the case of even number of electrons, a low temperature magneto-transport study is provided, which demonstrates a Zeeman splitting of the zero-bias anomaly at energies well below the Kondo scale.