Berlin 2008 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 1: Towards Molecular Spintronics
DS 1.4: Vortrag
Montag, 25. Februar 2008, 11:00–11:15, H 2013
Electrical detection of spin coherence in thin organic layers — •Sebastian Schäfer1, Somaie Saremi1, Wolfgang Harneit1, Kati Hübener1, and Konstantinos Fostiropoulos2 — 1Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany — 2Hahn-Meitner-Institut Berlin, Abteilung Heterogene Materialsysteme, Glienicker Str. 100, 14109 Berlin, Germany
An experimental demonstration of electrical detection of coherent spin motion of weakly coupled, localized electron spins in thin Fullerene C60-Films at room temperature is presented. Pulsed electrically detected magnetic resonance experiments on vertical photocurrents through Al/C60/ZnO samples showed that an electron spin Rabi oscillation of ≈ 104 spins is detected by transient current changes. The nature of possible microscopic mechanisms responsible for this spin to charge conversion as well as its implications for the readout of endohedral Fullerene (N@C60) spin qubits are discussed. Furthermore, current experiments on thin layers relavant for organic photovoltaic devices are presented.