Abstract
Conduction measurements of magnetic systems at low temperature, like the present study of 3d transition metal MePc on Ag(100) are closely intertwined with a phenomenon known as the Kondo effect. Essentially it is a coupling of the conduction electrons of a metal to a magnetic impurity. Below a critical temperature, the so-called Kondo temperature, the coupling leads to a screening of the spin of the magnetic impurity due to the creation of a many-body singlet state. This gives rise to a typical sharp resonance in the DOS at the Fermi level, which can be accessed experimentally by STS measurements. This Kondo resonance is characteristic of magnetic impurities on a non-magnetic surface. Hereby it provides a method for STM measurements to probe the magnetic properties of adatoms or molecules.
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Krull, C. (2014). Introduction to the Kondo Effect. In: Electronic Structure of Metal Phthalocyanines on Ag(100). Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-02660-2_3
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