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

Großmann, Nicolas; Magri, Andrea 1; Laux, Martin; Stadtmüller, Benjamin; Thielen, Philip; Schäfer, Bernhard 1; Fuhr, Olaf 1; Ruben, Mario 1; Cinchetti, Mirko; Aeschlimann, Martin
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

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 highly spin-polarized interface states. ... mehr

DOI: 10.1039/C6DT03183H
Zitationen: 4
Web of Science
Zitationen: 5
Zitationen: 4
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator 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 (POF III, LK 01) Molecular Engineering
Erschienen in Dalton transactions
Verlag Royal Society of Chemistry (RSC)
Band 45
Heft 45
Seiten 18365–18376
Nachgewiesen in Dimensions
Web of Science
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