Molecular Metal Complexes as Defined Spin Impurities for Kondo Physics

Drittmittelfinanzierte Einzelförderung


Details zum Projekt

Projektleiter/in:
Prof. Dr. Heiko Weber


Beteiligte FAU-Organisationseinheiten:
Lehrstuhl für Angewandte Physik

Mittelgeber: DFG-Einzelförderung / Sachbeihilfe (EIN-SBH)
Projektstart: 01.07.2005
Projektende: 30.06.2009


Forschungsbereiche

Elektronentransport auf molekularer Skala (Prof. Weber)
Lehrstuhl für Angewandte Physik


Kurzbeschreibung (allgemeinverständlicher Überblick):


The interaction of molecules with metals has recently attracted increasing attention due to the appearance of molecular electronics as a candidate for future nanoelectronics. In this project, we will create and investigate systems where a molecule carries an unpaired spin. We propose to investigate two types of interaction between the spin degree of freedom and the conduction electrons in the metal: The first experiment is dedicated to the dynamical screening of the spin degree of freedom by the conduction electrons of the metal, a phenomenon which is closely related to the Kondo effect known in solid state metals with magnetic impurities. For that purpose, we will immobilize spin-bearing coordination compounds (e.g. FeII and CoII compounds) in single-molecule junctions. Thereby, the main observable parameter will be the I/V dependence of a current passing through the spin-bearing molecule. Second, we will investigate binuclear compounds with two spin degrees of freedom. Here, more complicated variations of Kondo physics can be explored. As a further reaching goal (and presumably beyond the two-year period for this grant), this research will guide towards Spintronics on the single-molecule level, where the electron transport can be controlled by the relative orientation of the two spins. The requirements to the molecules and the experiment are delicate and imperatively need a close cooperation between synthetic chemistry and experimental physics.



Publikationen

Wagner, S., Kißlinger, F., Ballmann, S., Schramm, F., Chandrasekar, R., Bodenstein, T.,... Weber, H.B. (2013). Switching of a coupled spin pair in a single-molecule junction. Nature Nanotechnology, 8(8), 575-579. https://dx.doi.org/10.1038/nnano.2013.133
Ruben, M., Landa, A., Lörtscher, E., Riel, H., Mayor, M., Görls, H.,... Evers, F. (2008). Charge Transport Through a Cardan-Joint Molecule. Small, 4(12), 2229-2235. https://dx.doi.org/10.1002/smll.200800390

Zuletzt aktualisiert 2019-13-02 um 09:47