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O: Fachverband Oberflächenphysik
O 18: Poster: 2D Materials I
O 18.2: Poster
Monday, March 27, 2023, 18:00–20:00, P2/EG
Assembly of van der Waals heterostructures with ultra-clean surfaces for surface science techniques — Keda Jin1, Tobias Wichmann1, Felix Lüpke1, Tomáš Samuely2, Oleksander Onufriienko2, F. Stefan Tautz1, Markus Ternes1, and •Jose Martinez-Castro1 — 1Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany — 2Centre of Low Temperature Physics, Faculty of Science, P. J. Safarik University & Institute of Experimental Physics, Slovak Academy of Sciences, Kosice, Slovakia
Van der Waals heterostructures have become an excellent platform to study emerging physical phenomena that are the result of synergistic proximity effects. Until recently, surface science techniques such as ARPES or STM have been excluded from the study of such heterostructures because of their high sensitivity to surface contamination and the fact that they are sensitive to the top-most layer and thus, not being able to use, boron nitride as the encapsulating layer. Here, we report a novel technique for the assembly of van der Waals heterostructures that do not require encapsulation nor melting of polymers, allowing the study of air-sensitive materials surface. By performing low temperature STM, we demonstrate no surface degradation, achieving atomic resolution as well as detecting a perfectly formed superconducting gap in NbSe2.