Plasmon losses in core-level photoemission spectra studied by the quantum Landau formula including full multiple scattering

Misato Kazama, Hiroshi Shinotsuka, Yusuke Ohori, Kaori Niki, Takashi Fujikawa, L. Kövér

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We study the angular and energy dependence of surface and bulk plasmon losses accompanying deep core excitations in simple metals. Here full multiple scatterings of photoelectrons are taken into account before and after the plasmon losses within the quantum Landau formula, which can describe overall features of the photoemission bands. For example, multiple plasmon loss features can be calculated by use of the formula. Two simple metals, Al and Na, are studied here. The depth profiles of the plasmon losses are strongly influenced by the elastic scatterings. The model assuming single elastic scatterings overestimates the losses from deep emitters due to the forward focusing effects, whereas the model accounting for full multiple scatterings gives a much rapidly decaying function of the depth due to the defocusing effects and rich structures due to the photoelectron diffraction. The single elastic scattering approximation gives a poor result both for the depth profiles and for the loss spectra. The present multiple scattering calculations successfully explain the azimuthal dependence of the loss spectra, which reflect the local geometry around the emitters.

Original languageEnglish
Article number045110
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number4
DOIs
Publication statusPublished - Jan 9 2014

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Core levels
Multiple scattering
Photoemission
photoelectric emission
Elastic scattering
scattering
elastic scattering
Photoelectrons
emitters
photoelectrons
Metals
defocusing
profiles
metals
Diffraction
Geometry
geometry
approximation
diffraction
excitation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Plasmon losses in core-level photoemission spectra studied by the quantum Landau formula including full multiple scattering. / Kazama, Misato; Shinotsuka, Hiroshi; Ohori, Yusuke; Niki, Kaori; Fujikawa, Takashi; Kövér, L.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 4, 045110, 09.01.2014.

Research output: Contribution to journalArticle

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