Berry-phase oscillations of the kondo effect in single-molecule magnets
Abbreviated Journal Title
Phys. Rev. Lett.
QUANTUM; MAGNETIZATION; INTERFERENCE; NANOMAGNETS; PARTICLES; CLUSTERS; FAMILY; Physics, Multidisciplinary
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.
Physical Review Letters
"Berry-phase oscillations of the kondo effect in single-molecule magnets" (2006). Faculty Bibliography 2000s. 6343.