Berlin 2024 – scientific programme
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MA: Fachverband Magnetismus
MA 29: Spin-Dependent Phenomena in 2 D
MA 29.5: Talk
Wednesday, March 20, 2024, 16:00–16:15, EB 202
Magnetic Properties of Non-van der Waals 2D Materials — Tom Barnowsky1,2, Mahdi Ghorbani-Asl1, Thomas Heine1,2, Stefano Curtarolo3, Arkady V. Krasheninnikov1,4, and •Rico Friedrich1,2,3 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden — 2TU Dresden — 3Duke University, Durham, USA — 4Aalto University, Aalto, Finland
While 2D materials are traditionally derived from bulk layered crystals bonded by weak van der Waals (vdW) forces, the recent surprising experimental realization of non-vdW 2D compounds obtained from non-layered transition metal oxides [1] foreshadows a new direction in 2D systems research.
As outlined by our recent data-driven investigations [2, 3], these materials exhibit unique magnetic properties owing to the magnetic cations at the surface of the sheets. Despite of several ferromagnetic candidates, even for the antiferromagnetic representatives, the surface spin polarizations are diverse ranging from moderate to large values modulated in addition by ferromagnetic and antiferromagnetic in-plane coupling. At the same time, chemical tuning by surface passivation provides a valuable handle to further control the magnetic properties of these novel 2D compounds [4] thus rendering them an attractive platform for fundamental and applied nanoscience.
[1] A. Puthirath Balan et al., Nat. Nanotechnol. 13, 602 (2018).
[2] R. Friedrich et al., Nano Lett. 22, 989 (2022).
[3] T. Barnowsky et al., Adv. Electron. Mater. 9, 2201112 (2023).
[4] T. Barnowsky et al., submitted, arXiv:2310.07329 (2023).
Keywords: 2D materials; magnetism; non-van der Waals compounds; data-driven research; high-throughput computing