Electron supersurface scattering on polycrystalline Au

  • Supersurface electron scattering, i.e., electron energy losses and associated deflections in vacuum above the surface of a medium, is shown to contribute significantly to electron spectra. We have obtained experimental verification (in absolute units) of theoretical predictions that the angular distribution of the supersurface backscattering probability exhibits strong oscillations which are anticorrelated with the generalized Ramsauer-Townsend minima in the backscattering probability. We have investigated 500-eV electron backscattering from an Au surface for an incidence angle of 70° and scattering angles between 37° and 165°. After removing the contribution of supersurface scattering from the experimental data, the resulting angular and energy distribution agrees with the Landau-Goudsmit-Saunderson (LGS) theory, which was proposed about 60 years ago, while the raw data are anticorrelated with LGS theory. This result implies that supersurface scattering is an essential phenomenon for quantitative understanding of electron spectra.

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Metadaten
Author:Wolfgang S. M. Werner, Mihály Novák, Francesc Salvat-PujolORCiD, Josef Zemek, Petr Jiricek
URN:urn:nbn:de:hebis:30:3-300850
DOI:https://doi.org/10.1103/PhysRevLett.110.086110
ISSN:1079-7114
ISSN:0031-9007
Parent Title (English):Physical review letters
Publisher:American Physical Society
Place of publication:College Park, Md.
Document Type:Article
Language:English
Date of Publication (online):2013/02/22
Date of first Publication:2013/02/22
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2013/06/14
Volume:110
Issue:8, 086110
Page Number:5
Note:
Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
HeBIS-PPN:34713436X
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
PACS-Classification:60.00.00 CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES / 68.00.00 Surfaces and interfaces; thin films and nanosystems (structure and nonelectronic properties) (for surface and interface chemistry, see 82.65.+r, for surface magnetism, see 75.70.Rf) / 68.49.-h Surface characterization by particle-surface scattering (see also 34.35.+a Interactions of atoms and molecules with surfaces) / 68.49.Jk Electron scattering from surfaces
70.00.00 CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES / 79.00.00 Electron and ion emission by liquids and solids; impact phenomena / 79.20.-m Impact phenomena (including electron spectra and sputtering)
70.00.00 CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES / 79.00.00 Electron and ion emission by liquids and solids; impact phenomena / 79.60.-i Photoemission and photoelectron spectra
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 3.0