SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 47: 2D Materials II: Growth, Structure and Substrate Interaction I

O 47.6: Vortrag

Mittwoch, 29. März 2023, 11:45–12:00, GER 37

Local Electronic Structure of h-BN on Pt(110) — •Marco Thaler1, Florian Mittendorfer2, Erminald Bertel1, and Laerte Patera11Institute of Physical Chemistry, University of Innsbruck, Austria — 2Institute of Applied Physics and Center for Computational Materials Science, Vienna University of Technology, Austria

The growth of large-scale single-orientation hexagonal boron nitride (h-BN) monolayer has been recently achieved on the Pt(110) surface, exploiting the inversion of the normal substrate-adsorbate relation [1]. Here we performed Scanning Tunneling Spectroscopy to locally probe the electronic structure of h-BN and investigate the bonding configuration in detail. The moiré pattern arising from the mismatch with the substrate is observed to induce a modulation of the conduction band onset of h-BN and a shift of the Pt-related state, implying varying interaction energies. In agreement with density functional theory, the local density of states near the Fermi energy indicates a localized covalent bonding between h-BN and Pt, causing a (1xn)-missing row reconstruction of the Pt(110) surface. [1] D. Steiner, et al., ACS Nano, 13, 7083-7090 (2019).

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