Berlin 2024 – scientific programme
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O: Fachverband Oberflächenphysik
O 70: Poster: Spins on Surfaces & Surface Magnetism
O 70.9: Poster
Wednesday, March 20, 2024, 18:00–20:00, Poster C
Self-Assembly of Magnetic Atom-Molecule Complexes on a Surface — Wantong Huang1, Paul Greule1, Máté Stark1, Joris Van Slageren2, Benedetta Casu3, Christoph Sürgers1, Wolfgang Wernsdorfer1, Giorgio Sangiovanni4, Christoph Wolf5, and •Philip Willke1 — 1Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany — 2Institute of Physical Chemistry and Center for Integrated Quantum Science and Technology IQST, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany — 3Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany. — 4Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 5Center for Quantum Nanoscience, Institute for Basic Science (IBS), Seoul, Republic of Korea.
Both single atomic as well as molecular spin centers are prime candidates for atomic-scale quantum information processing and often individually addressed and manipulated using STM. Here, we demonstrate a reliable self-assembly of magnetic complexes consisting of individual iron (Fe) atoms and molecules on a silver substrate. We employ two types of molecules, bis(dibenzoylmethane) copper(II) [Cu(dbm)2] and iron phthalocyanine (FePc), and show that Fe atoms always preferentially attach underneath the benzene ring ligand of the molecules. In both cases, a molecule can host up to two Fe atoms. In addition, we observe a change in the magnetic properties of the attached Fe atoms in spectroscopy, revealing a distinct Kondo signature at the Fe site.
Keywords: scanning tunneling microscopy; Kondo effect; magnetic molecules; atom-molecule hybrid complexes; spins on surfaces