SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 40: Poster Magnetism II
MA 40.59: Poster
Donnerstag, 30. März 2023, 14:00–16:00, P2/EG
2D van-der Waals Heterostructures — •Burak Özer1, Arthur Veyrat1, Sebastian Selter1, Saicharan Aswartham1, Rudolf Schäfer2, Ivan Soldatov2, Bernd Büchner1,3, and Burak Ozer1 — 1Leibniz IFW Dresden, Institute for Solid State Research, 01069 Dresden, Germany — 2Helmholtzstr 20 — 3Technische Universität Dresden, Faculty of Physics, 01062 Dresden, Germany
2D materials and their properties are being investigated since 2004 when researchers obtained the monolayer graphene and investigated its excellent electrical properties. To produce down-to-monolayer materials the mechanical exfoliation technique has been used since the very beginning. In 2013, researchers found a technique that allows to build a 3D structure from exfoliated 2D materials like LEGO blocks and control their physical properties, called van-der-Waals (vdW) stacking. Combining 2D materials for the discovery and characterization of new topological phases could pave the way for many opportunities for new and interesting fundamental aspects of physics, also for potential applications. This work shows how to exfoliate and encapsulate different materials, including graphene, hBN and Cr_2 Ge_2 Te_6 (T_c ~62 K) crystal, which is a paramagnetic at bulk; but recently researchers have found out at down-to-monolayer thicknesses, it showed ferromagnetic behavior. The magnetism of Cr_2 Ge_2 Te_6 has investigated at several thicknesses to observe their hysteresis curves by MOKE; to compare the difference between encapsulated with hBN and free-standing CGT behavior, we conducted the magnetic measurement for two different flakes.