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DS: Fachverband Dünne Schichten

DS 18: Poster: Towards Molecular Spintronics, Organic Thin Films, Optical Layers, Vibrational Spectroscopy, Tayloring organic interfaces

DS 18.3: Poster

Tuesday, February 26, 2008, 14:30–19:30, Poster A

Magnetization Tunneling and Quantum Transport in Single Molecule Magnets — •Nikolaos P. Konstantinidis^1,2, Maarten R. Wegewijs^1,2, Christian Romeike¹, Herbert Schoeller¹, and Walter Hofstetter³ — ¹Institut für Festkörper-Forschung - Theorie III, Forschungszentrum Jülich, 52425 Jülich, Germany — ²Institut für Theoretische Physik A, RWTH Aachen, 52056 Aachen, Germany — ³Institut für Theoretische Physik, J. W. Goethe-Universität, D-60438 Frankfurt, Germany

The electric current through a single molecule magnet is investigated theoretically as function of an external magnetic field. We present results for the linear transport regime obtained by the numerical renormalization group (NRG) technique [1], as well as non-linear transport properties obtained using quantum kinetic equations. We predict effects related to the coherent magnetization tunneling generated by the magnetic anisotropy. In particular, we show how non-trivial Kondo and spin-tunneling effects allow for a complete determination of the magnetic properties of such a device by transport experiments.

[1] M. R. Wegewijs, C. Romeike, H. Schoeller and W. Hofstetter, New J. Phys. 9 344, (2007).