Dynamic spin filtering at the Co/Alq<inf>3</inf> interface mediated by weakly coupled second layer molecules
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2016Access:
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Droghetti A, Thielen P, Rungger I, Haag N, Gro? mann N, St??ckl J, Stadtm??ller B, Aeschlimann M, Sanvito S, Cinchetti M, Dynamic spin filtering at the Co/Alq<inf>3</inf> interface mediated by weakly coupled second layer molecules, Nature Communications, 7, 2016, 12668-Download Item:
Abstract:
Spin filtering at organic-metal interfaces is often determined by the details of the interaction between the organic molecules and the inorganic magnets used as electrodes. Here we demonstrate a spin-filtering mechanism based on the dynamical spin relaxation of the long-living interface states formed by the magnet and weakly physisorbed molecules. We investigate the case of Alq3 on Co and, by combining two-photon photoemission experiments with electronic structure theory, show that the observed long-time spin-dependent electron dynamics is driven by molecules in the second organic layer. The interface states formed by physisorbed molecules are not spin-split, but acquire a spin-dependent lifetime, that is the result of dynamical spin-relaxation driven by the interaction with the Co substrate. Such spin-filtering mechanism has an important role in the injection of spin-polarized carriers across the interface and their successive hopping diffusion into successive molecular layers of molecular spintronics devices.
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European Union Framework Programme 7 (FP7)
618082 ACMOL.
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http://people.tcd.ie/sanvitoshttp://people.tcd.ie/droghea
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PUBLISHEDCited By :1 Export Date: 5 January 2017
Author: Sanvito, Stefano; Droghetti, Andrea
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Nature Communications7
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