Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 10: Metal substrates: Adsorption of organic / bio molecules II
O 10.1: Vortrag
Montag, 14. März 2011, 15:00–15:15, TRE Phy
Spin-sensitive tunneling through individual Terbium-Phthalocyanine Molecules by Spin-polarized Scanning Tunneling Microscopy — •Jörg Schwöbel1, Yingshuang Fu1, Andrew Dilullo2, Jens Brede1, Svetlana Klyatskaya3, Mario Ruben3,4, Germar Hoffmann1, and Roland Wiesendanger1 — 1Institute of Applied Physics, University of Hamburg, Germany — 2Nanoscale & Quantum Phenomena Institute, Ohio University, USA — 3Karlsruhe Institute of Technology, Institute of Nanotechnology, Germany — 4Université de Strasbourg, IPCMS, France
Terbium-Phthalocyanine double-decker molecules (TbPc2) belong to the class of single-molecule magnets, which could serve as the smallest building blocks of future information technology devices such as for quantum computers and data storage. Because of its high blocking temperature (>10 K), TbPc2 attracted considerable interests in recent years [1].
Here, we locally address TbPc2 adsorbed on a ferromagnetic surface (Co nanoislands) with spin-polarized scanning tunneling microscopy. We detect a significant spin contrast by tunneling through TbPc2 molecules with intramolecular resolution. Thereby, the spin-polarization depends on the energy and the position within the molecule.
We present our experimental data and discuss the origin of the magnetic contrast observed.
[1] Ishikawa, N.; Sugita, M.; Ishikawa, T.; Koshihara, S.; Kaizu, Y.; J. Am. Chem. Soc., 2003, 125 (29), pp 8694-8695