Workshop book - Physikzentrum der RWTH Aachen - RWTH Aachen ...

Talks Monday February 4
Interplay of the Kondo Effect and Spin-Polarized Transport in Magnetic
Molecules, Adatoms, and Quantum Dots
Ireneusz Weymann, Adam Mickiewicz University, Poznań
Theoretical results on the interplay of the Kondo effect and spin-polarized
tunneling in a class of systems exhibiting uniaxial magnetic anisotropy, such
as magnetic molecules, magnetic adatoms, or quantum dots coupled to a
localized magnetic moment will be presented. In particular, the dependence
of the spectral functions and linear conductance on the system’s parameters
will be thoroughly discussed. It will be shown that both the magnetic
anisotropy as well as the exchange coupling between electrons tunneling
through the conducting orbital and magnetic core play an important role
in the formation of the Kondo resonance, leading generally to its suppression.
Specific transport properties of such a system appear also as a nontrivial
behavior of tunnel magneto-resistance. Moreover, the underscreened Kondo
effect in spin S=1 magnetic quantum dots will be discussed.
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