Regensburg 2013 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 40: Poster Session Correlated Electrons

TT 40.1: Poster

Mittwoch, 13. März 2013, 15:00–19:00, Poster D

NRG calculations for Kondo-type models as a way to characterize the magnetic properties of deposited molecules — •Henning-Timm Langwald and Jürgen Schnack — Universität Bielefeld, Fakultät für Physik, Bielefeld, Deutschland

Magnetic molecules offer a variety of interesting properties which may be used for future technologies. For such applications a molecule might be deposited on a substrate with which it then interacts. Thus in general, when describing the magnetic properties of the deposited molecule, the interaction with the substrate has to be taken into account and needs to be modeled in a suitable way.

We use Numerical Renormalization Group (NRG) calculations for certain single-impurity Kondo models as a way to access the magnetic properties of such deposited molecules. By analyzing simple model systems such as a dimer (an impurity consisting of two spins) coupled to a single site of a substrate lattice we want to gain insight into the specific behavior of deposited molecules and the ways we can describe them. Our focus is on thermodynamic observables such as the magnetization and their dependence on temperature and magnetic field.