Journal Article

PreJuSER-17486

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Band mapping in x-ray photoelectron spectroscopy: An experimental and theoretical study of W(110) with 1.25 keV excitation

Papp, C.FZJ* ; Plucinski, L.FZJ* ; Minar, J.FZJ* ; Braun, J.FZJ* ; Ebert, H.FZJ* ; Schneider, C. M.FZJ* ; Fadley, C. S.FZJ*

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10908  doi:10.1103/PhysRevB.84.045433

Abstract: Angle-resolved photoemission spectroscopy (ARPES) has generally been carried out at energies below similar to 150 eV, but there is growing interest in going to higher energies so as to achieve greater bulk sensitivity. To this end, we have measured ARPES spectra from a tungsten (110) crystal in a plane containing the [100], [110], and [010] directions with a photon energy of 1253.6 eV. The experimental data are compared to free-electron final-state calculations in an extended zone scheme with no inclusion of matrix elements, as well as highly accurate one-step theory including matrix elements. Both models provide further insight into such future higher-energy ARPES measurements. Special effects occurring in a higher-energy ARPES experiment, such as photon momentum, phonon-induced zone averaging effects, and the degree of cryogenic cooling required are discussed, together with qualitative predictions via appropriate Debye-Waller factors for future experiments with a number of representative elements being presented.

Keyword(s): J

Note: The experimental work was supported by the U.S. Department of Energy, under Contract No. DE-AC02-05CH11231 (C.P., C.S.F.). Postdoctoral support was provided by the Humboldt Foundation (C.P.). The one-step photoemission theoretical calculations were funded by the German BMBF (Bundesministerium fur Bildung und Forschung) under Contract No. FKZ-05-KS1WMB/1 and German DFG under Contract No. EB154/23-1 (J.M., J.B. and H.E.).

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Contributing Institute(s):

1. Elektronische Eigenschaften (PGI-6)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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