Spin-coupled double-quantum-dot behavior inside a single-molecule transistor

Details Spin-coupled double-quantum-dot behavior inside a single-molecule transistor Spin-coupled double-quantum-dot behavior inside a single-molecule transistor

2010-04-26

arxiv.org/abs/1004.4556v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report on the observation of Kondo and split Kondo peaks in single-molecule transistors containing a single spin transition molecule with a Fe2+ ion. Coulomb blockade characteristics reveal a double quantum dot behavior in a parallel configuration, making our system a molecular equivalent to a semiconducting double-quantum-dot system. As the gate voltage is increased the charging of the second dot by an additional electron induces a splitting of the Kondo peak. We discuss possible origins of this effect including a spin transition into a high-spin state.

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