Dresden 2011 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 21: TR: Nanoelectronics III - Molecular Electronics 2

TT 21.6: Talk

Tuesday, March 15, 2011, 12:00–12:15, HSZ 301

Coherent transport and the effects of strong correlations in cobalt-benzene sandwich molecules — •Michael Karolak¹, David Jacob², and Alexander Lichtenstein¹ — ¹I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, D-20355 Hamburg, Germany — ²Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany

We study the impact of dynamical correlations on the electronic structure and coherent transport properties of cobalt-benzene sandwich molecules (see e.g. [1]) hosted in a copper nanocontact. The interactions of the Co 3d electrons are fully taken into account by combining density functional calculations with a dynamical treatment of the strong correlations in the Co 3d shell in the one-crossing approximation [2]. We find that depending on the geometry of the contact region the hybridization of the Co 3d shell with the benzene ring states and dynamical correlations give rise to the Kondo effect and thus lead to Fano-like features in the coherent transport characteristics.
T. Kurikawa et al. J. Phys. Chem. 99, 16248 (1995)
D. Jacob et al. Phys. Rev. Lett. 103, 016803 (2009)