Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: 2D Materials III: Nanomembranes, hBN, and Particle Interactions
O 59.5: Vortrag
Mittwoch, 3. April 2019, 16:15–16:30, H16
Real-time investigation of the growth of hexagonal boron nitride on the Ni(111) surface — •Miriam Raths1,2, Janina Felter1,2, and Christian Kumpf1,2 — 1Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany — 2Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, Germany
The 2D material hexagonal boron nitride (hBN) has attracted strongest interest recently due to its specific structural and electronic properties. In this study, we aim for a deeper understanding of its nucleation and growth behavior, as this is necessary to produce high quality layers of hBN.
The growth of hBN on the Ni(111) surface depends strongly on the preparation of the substrate before deposition. In our study, we have used two different cleaning methods for the substrate resulting in different defects densities. In both cases, the growth of hBN was imaged in-situ and in real time by means of LEEM. Four different structures were found on the surface: (1) A commensurate and (2) a rotated hBN monolayer structure, the latter with various azimuthal rotation angles, as well as two bilayer structures consisting of either (3) two rotated or (4) one commensurate and one rotated layer of hBN. While the formation of all of these structures was observed on the Ni(111) surface with low defect density, at higher defect density only the two monolayer phases were found. For both growth experiments, we present a detailed analysis of (bright and dark field) LEEM and µLEED data.