Cotunneling through a magnetic single-molecule transistor based on N\atC60

Details Cotunneling through a magnetic single-molecule transistor based on N\atC60 Cotunneling through a magnetic single-molecule transistor based on N\atC60

2011-01-21

arxiv.org/abs/1101.4198v1

Phys. Rev. B 83, 081407(R) (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted for publication in PRB Rapid Com, 4 pages, 4 figures, with supplementary information (6 pages, 3 figures)

Scientific paper

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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