Regensburg 2016 – scientific programme

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O: Fachverband Oberflächenphysik

O 54: 2D Materials II: Growth

O 54.9: Talk

Wednesday, March 9, 2016, 12:30–12:45, S053

Structural analysis of one monolayer of hBN on Cu(111) via NIXSW and SPA-LEED — •Timo Heepenstrick¹, Christine Brülke¹, Ina Krieger¹, Sergey Subach², Simon Weiß², Niklas Humberg¹, and Moritz Sokolowski¹ — ¹Institut für Physikalische und Theoretische Chemie der Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany — ²Peter Grünberg Institut, Forschungszentrum Jülich, 52452 Jülich, Germany

We present a detailed structural analysis of hBN on Cu(111) with normal incidence x-ray standing waves (NIXSW) supported by spot profile analysis low energy electron diffraction (SPA-LEED). hBN forms an incommensurate structure on Cu(111) with a lattice mismatch of 2.3% corresponding to the unstrained hBN layer. The NIXSW experiments show that the hBN layer is weakly bonded with a distance of 3.23 Å (for the nitrogen) and 3.26 Å (for the boron) and shows little buckling. We also present an analysis for the topmost Cu(111) layer with and without a monolayer of hBN.