Berry-Phase Oscillations of the Kondo Effect in Single-Molecule Magnets

Michael N. Leuenberger and Eduardo R. Mucciolo
Phys. Rev. Lett. 97, 126601 – Published 18 September 2006

Abstract

We show that it is possible to topologically induce or quench the Kondo resonance in the conductance of a single-molecule magnet (S>1/2) strongly coupled to metallic leads. This can be achieved by applying a magnetic field perpendicular to the molecule easy axis and works for both full- and half-integer spin cases. The effect is caused by the Berry-phase interference between two quantum tunneling paths of the molecule’s spin. We have calculated the renormalized Berry-phase oscillations of the Kondo peaks as a function of the transverse magnetic field as well as the conductance of the molecule by means of the poor man’s scaling method. We propose to use a new variety of the single-molecule magnet Ni4 for the experimental observation of this phenomenon.

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  • Received 4 May 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.126601

©2006 American Physical Society

Authors & Affiliations

Michael N. Leuenberger1,2,* and Eduardo R. Mucciolo2,†

  • 1NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, USA
  • 2Department of Physics, University of Central Florida, Orlando, Florida 32816, USA

  • *Email address: mleuenbe@mail.ucf.edu
  • Email address: mucciolo@physics.ucf.edu

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Issue

Vol. 97, Iss. 12 — 22 September 2006

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