Abstract
We show that it is possible to topologically induce or quench the Kondo resonance in the conductance of a single-molecule magnet () 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 for the experimental observation of this phenomenon.
- Received 4 May 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.126601
©2006 American Physical Society