Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 76: Poster Focus Session Atomic Scale Investigation of Magnetic 2D Materials
O 76.1: Poster
Wednesday, March 19, 2025, 18:00–20:00, P2
Unconventional magnetic response in epitaxial-grown single-layer Cr2S3-2D — •Affan Safeer1, Calisa Carolina Oliveira2, Mahdi Ghorbani-Asl3, Jörg Schöpf1, Wouter Jolie1, Amilcar Bedoya-Pinto2, Arkady V. Krasheninnikov3, Thomas Michely1, and Jeison Fischer1 — 1Universität zu Köln, Köln, Germany — 2University of Valencia, Paterna, Spain — 3Institute of Ion Beam Physics and Materials Research, Dresden, Germany
We studied the magnetic ordering in epitaxially-grown single-layer Cr2S3-2D on Gr/Ir(110) using X-ray magnetic circular dichroism (XMCD), scanning tunneling microscopy (STM) and spectroscopy (STS). Prior characterization of the 2D material structure via low-energy electron diffraction (LEED), STM, and density functional theory (DFT) calculations confirmed that single-layer Cr2S3-2D has a NiAs-type structure. DFT calculations further predicted that the ground state could be either A-type antiferromagnetic or ferromagnetic, depending on the Hubbard parameter. Differential conductance STS measurements as a function of the out-of-plane magnetic field at 1.7 K show a hysteresis behavior with a switching field of about 4T, indicating a ferromagnetic ordering. In contrast, XMCD measurements on the same sample revealed no signal, indicating zero net magnetic moment, suggesting antiferromagnetic behavior.
Keywords: Chromium sulfide; single layer; 2D magnetism