Quantum tunneling induced Kondo effect in single molecular magnets

Details Quantum tunneling induced Kondo effect in single molecular magnets Quantum tunneling induced Kondo effect in single molecular magnets

2005-11-28

arxiv.org/abs/cond-mat/0511664v2

Phys. Rev. Lett., 96, 196601 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.96.196601

We consider transport through a single-molecule magnet strongly coupled to metallic electrodes. We demonstrate that for half-integer spin of the molecule electron- and spin-tunneling \emph{cooperate} to produce both quantum tunneling of the magnetic moment and a Kondo effect in the linear conductance. The Kondo temperature depends sensitively on the ratio of the transverse and easy-axis anisotropies in a non-monotonic way. The magnetic symmetry of the transverse anisotropy imposes a selection rule on the total spin for the occurrence of the Kondo effect which deviates from the usual even-odd alternation.

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