Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 31: Multiferroics and Magnetoelectric Coupling (joint session MA/KFM)
MA 31.9: Vortrag
Mittwoch, 20. März 2024, 17:15–17:30, EB 407
Atomic-scale visualization of multiferroicity in monolayer NiI2 — Mohammad Amini1, •Adolfo Fumega1, Hector Gonzalez-Herrero1,2,3, Viliam Vano1,4, Shawulienu Kezilebieke5, Jose Lado1, and Peter Liljeroth1 — 1Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland — 2Departamento de Fisica de la Materia Condensada, Universidad Autonoma de Madrid, E-28049 Madrid, Spain — 3Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, E-28049 Madrid, Spain — 4Joseph Henry Laboratories and Department of Physics, Princeton University, Princeton, NJ 08544, USA — 5Department of Physics, Department of Chemistry and Nanoscience Center, University of Jyvaskyla, FI-40014 University of Jyvaskyla, Finland
Multiferroics have been seen as a disruptive building block for technological applications. Recently, evidence of multiferroicity has been provided in monolayer NiI2. However, the multiferroic order in monolayer NiI2 has not been characterized yet. In order to address this issue, here we perform an atomic-scale visualization of monolayer NiI2. This is achieved by exploiting the atomic-scale magnetoelectric coupling in NiI2 to image spin-spiral multiferroics via scanning tunneling microscope (STM) experiments. Moreover, we directly show external electric field control of the multiferroic domains. Our result demonstrates a novel methodology to analyze and characterize the magnetic and electric orders in this type of multiferroics materials.
Keywords: 2D van der Waals materials; multiferroic; magnetoelectric coupling; Scanning Tunneling Microscopy; NiI2