title: Quantum-tunneling-induced Kondo effect in single molecular magnets.
abstract: 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.
authors.affiliation: Institut für Theoretische Physik A, RWTH Aachen, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Romeike
authors.forename: M R
authors.initials: MR
authors.lastname: Wegewijs
authors.forename: W
authors.initials: W
authors.lastname: Hofstetter
authors.forename: H
authors.initials: H
authors.lastname: Schoeller