Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 42: Metal substrates 2
O 42.3: Vortrag
Mittwoch, 7. September 2022, 11:00–11:15, S053
Breaking down of Stoner band ferromagnetism induced by interface formation — •David Janas1, Andrea Droghetti2, Iulia Cojocariu3, Vitaliy Feyer3, Stefano Ponzoni1, Milos Radonjić4, Ivan Rungger5, Liviu Chioncel6, Giovanni Zamborlini1, and Mirko Cinchetti1 — 1TU Dortmund University, Dortmund, Germany — 2Trinity College, Dublin, Ireland — 3Forschungszentrum Jülich, Jülich, Germany — 4University of Belgrade, Belgrade, Serbia — 5National Physics Laboratory, Teddington, United Kingdom — 6University of Augsburg, Augsburg, Germany
Interfaces between ferromagnetic transition metals and molecules or atoms display intriguing spin properties that have been invoked to explain the peculiar behavior of a variety of molecular spintronic and spin-optoelectronic devices [1]. Despite its relevance, a satisfying model for the hybridization occurring at such interfaces has not yet been presented. Experimentally, this is due to the lack of information on the interface band structure in the whole Brillouin zone, while, theoretically, the role of electron correlation has up to now mostly been neglected. Here, we overcome these limitations using state-of-the-art experimental and theoretical methods to explore the model interface between iron and an ordered oxygen layer. We use spin-resolved momentum microscopy to provide access to the complete spin-resolved interface band structure and explain our findings using DFT+Σ2 calculations that go beyond the one-electron approximation [2].
[1] Cinchetti, M. et al. Nature Mater 16, 507-515 (2017).
[2] Droghetti, A. et al. Phys. Rev. B 105, 115129 (2022).