Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 33: Focus Session "Spins in Organic Materials I" (jointly with DS)

MA 33.3: Topical Talk

Mittwoch, 16. März 2011, 12:00–12:30, GER 37

The strange life of a molecular spin observed under a microscope — •Germar Hoffmann — University of Hamburg, Germany — Academia Sinica, Taiwan

The 90ies saw the emerging of a new and fascinating class of magnetic materials based on molecules [1]. Although, the spin density is low, spin information can be efficiently stored in and transmitted by spatially and energetically well defined molecular orbitals. These orbitals can be experimentally precisely addressed. The internal and external spin interaction through molecular orbitals can be engineered by the molecular design. This opens also new concepts for spintronic devices through the combination of the molecular spin with additional functionality - on a length scale not accessible by classical systems. Though, the further development lacks of precise experimental access to understand the behavior of the individual molecular spin in a given environment and to guide toward an improved design of molecular spin-systems.

Here, I will present and discuss recent results on molecular magnetism. By means of spin-polarized scanning tunneling microscopy, scanning tunneling spectroscopy, and local manipulation, single magnetic molecules are locally and energetically investigated in different environments. Thereby, molecular systems cover commercially available [2], specially synthesized, and on-surface synthesized systems.

[1] R. Sessoli et al., JACS 115, 1804 (1993); M. Tamura et al., Chem. Phys. Lett. 186, 401 (1991). [2] J. Brede et al., Phys. Rev. Lett. 105, 047204 (2010); N. Atodiresei et al., Phys. Rev. Lett. 105, 066601 (2010).