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Controlled manipulation of the Co–Alq₃ interface by rational design of Alq₃ derivatives

Großmann, Nicolas; Magri, Andrea; Laux, Martin; Stadtmüller, Benjamin; Thielen, Philip; Schäfer, Bernhard; Fuhr, Olaf; Ruben, Mario; Cinchetti, Mirko; Aeschlimann, Martin

Abstract (englisch):
Recently, research has revealed that molecules can be used to steer the local spin properties of ferromagnetic surfaces. One possibility to manipulate ferromagnetic-metal–molecule interfaces in a controlled way is to synthesize specific, non-magnetic molecules to obtain a desired interaction with the ferromagnetic substrate. Here, we have synthesized derivatives of the well-known semiconductor Alq3 (with q = 8-hydroxyquinolinate), in which the 8-hydroxyquinolinate ligands are partially or completely replaced by similar ligands bearing O- or N-donor sets. The goal of this study was to investigate how the presence of (i) different donor atom sets and (ii) aromaticity in different conjugated π-systems influences the spin properties of the metal–molecule interface formed with a Co(100) surface. The spin-dependent metal–molecule-interface properties have been measured by spin-resolved photoemission spectroscopy, backed up by DFT calculations. Overall, our results show that, in the case of the Co–molecule interface, chemical synthesis of organic ligands leads to specific electronic properties of the interface, such as exciton formation or ... mehr

Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1039/C6DT03183H
ISSN: 1477-9226, 1477-9234, 0300-9246, 1364-5447, 1470-479X, 1472-7773, 1568-0258, 1570-5854
KITopen ID: 1000063075
HGF-Programm 43.21.04; LK 01
Erschienen in Dalton transactions
Band 45
Heft 45
Seiten 18365–18376
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