Berlin 2005 – wissenschaftliches Programm
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O: Oberflächenphysik
O 32: Nanostrukturen III
O 32.9: Vortrag
Montag, 7. März 2005, 12:45–13:00, TU EB202
One dimensional metal-organic chains on Cu(110): Cu-TMA (trimesic acid) and Fe-TMA — •Thomas Classen1, Giovanni Costantini1, Frank Stadler1, Cheolkyu Kim1, Klaus Kern1, Guido Fratesi2, Stefano Fabris2, Stefano de Gironcoli2, and Stefano Baroni2 — 1Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569 Stuttgart — 2SISSA and INFM DEMOCRITOS National Simulation Center, Via Beirut 2-4, I-34014 Trieste, Italy
One dimensional (1D) metal-organic coordination networks have been created on Cu(110) using self-organized growth. Trimesic acid (TMA) and Fe have been deposited in ultra-high-vacuum (UHV) by means of organic and conventional molecular beam epitaxy respectively. TMA deposition on Cu(110) results in the formation of metal-organic chains with Cu adatoms supplied from the step edges. The chains are mono-disperse and are oriented along the <110> substrate direction. By deposition of Fe also Fe-TMA chains were produced with a noticeably different morphology. Both chain types have been investigated using variable temperature scanning tunnelling microscopy in UHV and density functional theory in the generalized gradient approximation (DFT-GGA). The DFT-calculations predict a spin-polarization for the Fe atoms in the Fe-TMA chains. This opens the possibility to study a low dimensional magnetic system thermally stabilized by organic linker molecules.