SKM 2023 – scientific programme
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O: Fachverband Oberflächenphysik
O 20: Poster: Spins and Magnetism at Surfaces
O 20.5: Poster
Monday, March 27, 2023, 18:00–20:00, P2/EG
Electronic Structure of Chromium(II)-Bromide Islands on Niobium Diselenide — •Xianzhe Zeng1, Haonan Huang1, Sujoy Karan1, Klaus Kern1,2, and Christian Ast1 — 1Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany — 2Institut de Physique, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
Chromium(II) bromide is an inorganic two-dimensional (2D) van der Waals material. With molecular-beam epitaxy (MBE), superconducting islands can be formed after evaporating chromium(II) bromide onto a niobium diselenide substrate. Measurements have been conducted on the islands and at the edge of the islands with low-temperature scanning tunneling microscopy and spectroscopy. At the edge of the islands, a subgap peak could be identified from the dI/dV spectrum, suggesting the existence of an in-gap state. Our discovery is the first observation in the chromium(II) bromide-niobium diselenide heterostructure system, providing an interesting comparison with the reported Majorana zero energy mode at the edge of chromium(III) bromide islands growing on the same substrate.