Quantum size effects in Pb layers with absorbed Kondo adatoms: Determination of the exchange coupling constant

Udo Schwingenschlögl, I. A. Shelykh

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Abstract

We consider the magnetic interaction of manganese phtalocyanine (MnPc) absorbed on Pb layers that were grown on a Si substrate. We perform an ab initio calculation of the density of states and Kondo temperature as a function of the number of Pb monolayers. Comparison to experimental data [Y.-S. Fu et al., Phys. Rev. Lett. 99, 256601 (2007)] then allows us to determine the exchange coupling constant J between the spins of the adsorbed molecules and those of the Pb host. This approach gives rise to a general and reliable method for obtaining J by combining experimental and numerical results.
Original languageEnglish (US)
JournalPhysical Review B
Volume80
Issue number3
DOIs
StatePublished - Jul 1 2009

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