Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 19: Poster Monday: Scanning Probe Techniques 1

O 19.3: Poster

Montag, 5. September 2022, 18:00–20:00, P4

Designing a Scanning Probe Microscope to quantify electron correlations in novel 2D materials — •Nikhil Seeja Sivakumar, Henning von Allwörden, Daniel Wegner, Alexander Ako Khajetoorians, and Nadine Hauptmann — Institute for Molecules and Materials, Radboud University, Nijmegen, The Netherlands

Quantum phases in a single or few layers of van der Waal materials often exhibit novel types of charge and spin orders that are driven by electron correlations. To understand the role of electron-electron interactions, it is required to quantify the interplay between the geometric structure, charges and spins at the atomic scale. Scanning tunneling microscopy (STM) and its accompanying magnetic mode, spin polarized STM, are powerful techniques to study the geometric, electronic and magnetic structure, but their application is limited to metallic or semiconducting quantum phases. Here, we present the design and setup of a home-built scanning probe microscopy setup working at 1K based on a JT-stage with 4He, operating in a 3T out-of-plane magnetic field. The setup will combine STM with non-contact Atomic Force Microscopy, Kelvin Probe Force Microscopy, and Magnetic Exchange Force Microscopy to independently study the geometric, electronic and magnetic structure in insulating quantum phases of 2D materials, as well as at phase transitions to conducting phases. A gating stage will allow to study 2D materials in a device geometry.