Quantum-Tunneling-Induced Kondo Effect in Single Molecular Magnets

C. Romeike, M. R. Wegewijs, W. Hofstetter, and H. Schoeller
Phys. Rev. Lett. 96, 196601 – Published 17 May 2006

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.

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  • Received 28 November 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.196601

©2006 American Physical Society

Authors & Affiliations

C. Romeike, M. R. Wegewijs, W. Hofstetter, and H. Schoeller

  • Institut für Theoretische Physik A, RWTH Aachen, 52056 Aachen, Germany

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Issue

Vol. 96, Iss. 19 — 19 May 2006

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