• Fevre, P. Le
• Miyamachi, T.
• Thakur, P.
• Wulfhekel, W.
• Joly, L.
• Ibrahim, Fatima
• Djeghloul, F.
• Rinaldi, C.
• Bertran, F.
• Javaid, S.
• Beaurepaire, E.
• Taleb-Ibrahimi, A.
• Brookes, N. B.
• Boukari, S.
• Ohresser, P.
• Cantoni, M.
• Bowen, M.
• Scheurer, F.
• Alouani, M.
• Arabski, J.
• Mattana, R.
• Bertacco, R.
• Seneor, P.
• Kappler, J. -P.
• Weber, W.
• Jaafar, Amine

Abstract

Organic semiconductors constitute promising candidates toward large-scale electronic circuits that are entirely spintronics-driven. Toward this goal, tunneling magnetoresistance values above 300% at low temperature suggested the presence of highly spin-polarized device interfaces. However, such spinterfaces have not been observed directly, let alone at room temperature. Thanks to experiments and theory on the model spinterface between phthalocyanine molecules and a Co single crystal surface, we clearly evidence a highly efficient spinterface. Spin-polarised direct and inverse photoemission experiments reveal a high degree of spin polarisation at room temperature at this interface. We measured a magnetic moment on the molecule's nitrogen p orbitals, which substantiates an ab-initio theoretical description of highly spin-polarised charge conduction across the interface due to differing spinterface formation mechanisms in each spin channel. We propose, through this example, a recipe to engineer simple organic-inorganic interfaces with remarkable spintronic properties that can endure well above room temperature

Topics

• surface
• single crystal
• theory
• experiment
• semiconductor
• Nitrogen