Berry-phase oscillations of the kondo effect in single-molecule magnets

    Authors

    M. N. Leuenberger;E. R. Mucciolo

    Comments

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    Abbreviated Journal Title

    Phys. Rev. Lett.

    Keywords

    QUANTUM; MAGNETIZATION; INTERFERENCE; NANOMAGNETS; PARTICLES; CLUSTERS; FAMILY; Physics, Multidisciplinary

    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 Ni(4) for the experimental observation of this phenomenon.

    Journal Title

    Physical Review Letters

    Volume

    97

    Issue/Number

    12

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    4

    WOS Identifier

    WOS:000240680400048

    ISSN

    0031-9007

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