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O: Fachverband Oberflächenphysik

O 28: Oxide and insulator surfaces: Structure, epitaxy and growth – Poster

O 28.3: Poster

Montag, 9. März 2026, 18:00–20:00, P2

Growth of MgO on Ag(100) for promoting charge transfer of organic molecules — •Christian Haberland, Felix Otto, Maximilian Schaal, Jonas Brandhoff, Leon Bojunga, and Torsten Fritz — Institute of Solid State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany

Integer charge transfer between metal substrates and adsorbed organic molecules is a central mechanism governing interfacial electronic structure and thus the functionality of molecular devices. To control this process, ultrathin insulating films offer a powerful strategy by decoupling molecular orbitals from metallic states while still enabling quantized charge exchange. In this work, we report the successful preparation of MgO monolayer films on Ag(100) using controlled deposition of Mg and annealing procedures in an oxygen atmosphere. The resulting MgO/Ag(100) system provides a reliable platform for studying charge-transfer phenomena at oxide-supported interfaces. Comprehensive characterization was performed using photoelectron spectroscopy (UPS, XPS, XPD), revealing the electronic structure and stoichiometry, while scanning tunneling microscopy confirmed atomic-scale order and film continuity. The established growth of MgO serves as a robust model system for investigating integer charge transfer in metal/organic hybrid interfaces.

Keywords: Magnesium oxide; scanning tunneling microscopy; photoelectron spectroscopy; photoelectron diffraction