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Cotunneling through a magnetic single-molecule transistor based on N@C60

Nicolas Roch, Romain Vincent, Florian Elste, Wolfgang Harneit, Wolfgang Wernsdorfer, Carsten Timm, and Franck Balestro
Phys. Rev. B 83, 081407(R) – Published 15 February 2011
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Abstract

We present an experimental and theoretical study of a magnetic single-molecule transistor based on N@C60 connected to gold electrodes. Particular attention is paid to the regime of intermediate molecule-lead coupling, where cotunneling effects manifest themselves in the Coulomb-blockade regime. The experimental results for the differential conductance as a function of bias, gate voltage, and external magnetic field are in agreement with our analysis of the tunneling rates and provide evidence of magnetic signatures in single-N@C60 devices arising from an antiferromagnetic exchange interaction between the C60 spin and the nitrogen spin.

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  • Received 29 December 2010

DOI:https://doi.org/10.1103/PhysRevB.83.081407

©2011 American Physical Society

Authors & Affiliations

Nicolas Roch1, Romain Vincent1, Florian Elste2, Wolfgang Harneit3, Wolfgang Wernsdorfer1,*, Carsten Timm4, and Franck Balestro1,†

  • 1Institut Néel, associé à l’UJF, CNRS, Boîte Postale 166, F-38042 Grenoble Cedex 9, France
  • 2Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027, USA
  • 3Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
  • 4Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden, Germany

  • *wolfgang.wernsdorfer@grenoble.cnrs.fr
  • franck.balestro@grenoble.cnrs.fr

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Issue

Vol. 83, Iss. 8 — 15 February 2011

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