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Photoelectron Emission Excited by a Hard X-ray Standing Wave
DOI:
10.1007/978-3-319-24043-5_12
Authors:
Joseph C.
Woicik
(Brookhaven National Laboratory)
,
Jorg
Zegenhagen
(Diamond Light Source)
,
Tien-lin
Lee
(Diamond Light Source)
,
Sebastian
Thiess
(Deutsches Elektronen-Synchrotron)
Co-authored by industrial partner:
No
Type:
Book Chapter
State:
Published (Approved)
Published:
December 2015
Abstract: The following chapter describes the basics and some applications for the case that photoelectrons are emitted from a hard X-ray interference field instead of by a travelling wave. The dipole approximation holds astonishingly well even for hard X-rays as far as the magnitude of the transition matrix element is concerned. However, the forward-backward asymmetry caused by higher order multipole terms needs to be considered when the photoelectron is emitted by the coherent action of two X-ray waves travelling in different directions. This has implications on the chosen experimental set-up which will be briefly discussed together with other experimental aspects. Finally, some examples of X-ray standing wave analysis using hard X-ray photoelectron spectroscopy will be presented yielding the geometric and electronic structure of (crystalline) materials with pm resolution.
Journal Keywords: X-ray standing waves; Multipole contributions; Fourier imaging; Structure; Electronic structure; Graphene; Transition metal oxides; Perovskites
Subject Areas:
Physics
Technical Areas: