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Photoelectron Emission Excited by a Hard X-ray Standing Wave

DOI: 10.1007/978-3-319-24043-5_12 DOI Help

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

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