Quantum-tunneling-induced Kondo effect in single molecular magnets.
We consider transport through a single-molecule magnet strongly coupled to metallic electrodes. We demonstrate that, for a half-integer spin of the molecule, electron and spin tunneling 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 nonmonotonic 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.
Romeike
C
C
Institut für Theoretische Physik A, RWTH Aachen, Germany.
Wegewijs
M R
MR
Hofstetter
W
W
Schoeller
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H