Negative electron affinity opens quantum well in MgO layers on Ag(100)

Helmreich R, Classen A, Fauster T (2022)

Publication Language: English

Publication Type: Journal article

Publication year: 2022

Journal

Journal of Physics: Condensed Matter Institute of Physics: Hybrid Open Access

Book Volume: 34

Article Number: 045001

Journal Issue: 4

DOI: 10.1088/1361-648X/ac316c

Abstract

Epitaxial MgO films on Ag(100) were studied by photoelectron spectroscopy. From the low-energy part of the spectra we obtain a negative electron affinity of about -0.9 eV. Even though electrons in the lowest conduction band are not confined by a potential barrier at the surface, quantum-well resonances are observed. The dispersion of the conduction band is determined in good agreement with theoretical calculations. Aspects of observing image-potential states predicted by theory on MgO films are discussed.

Authors with CRIS profile

Rebecca Helmreich Lehrstuhl für Festkörperphysik Andrej Classen Lehrstuhl für Festkörperphysik Thomas Fauster Lehrstuhl für Festkörperphysik

Related research project(s)

Spectroscopy and Electronic Structure (funCOS) FOR 1878: funCOS - Funktionale molekulare Strukturen auf komplexen Oxidoberflächen Aug. 1, 2013 - Dec. 31, 2020

How to cite

APA:

Helmreich, R., Classen, A., & Fauster, T. (2022). Negative electron affinity opens quantum well in MgO layers on Ag(100). Journal of Physics: Condensed Matter, 34(4). https://doi.org/10.1088/1361-648X/ac316c

MLA:

Helmreich, Rebecca, Andrej Classen, and Thomas Fauster. "Negative electron affinity opens quantum well in MgO layers on Ag(100)." Journal of Physics: Condensed Matter 34.4 (2022).

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