Electron energy-loss and photoelectron spectroscopies of surfaces and two-dimensional crystals

Vladimir U. Nazarov*, Eugene E. Krasovskii, Vyacheslav M. Silkin

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Scopus citations

Abstract

Dielectric response of crystal surfaces and quasi two-dimensional (Q2-Dquasi two-dimensional (Q2-D)) crystals to incident electrons and photons underlies a variety of electronic and optical phenomena, such as the excitation of monopole, multipole, two-dimensional (2-D), and acoustic plasmons, which have vast implications for optical and electron spectroscopies. This chapter covers model and electronic structure approaches to dynamic dielectric screening and discusses the development of the field from the pioneering works by R.H. Ritchie and P. Feibelman up to recent ab-initio developments. Starting with the quantum-mechanical expression for the microscopic dielectric response (Sect. 17.1), we explain the emergence of surface plasmon modes and discuss their structure based on simplified model systems. We further introduce an ab-initio approach to calculate the response function for realistic systems. We discuss how the excitations manifest themselves in the inelastic scattering of electrons reflected from a solid surface or a Q2"​ D crystal (Sect. 17.2), at first confining ourselves to the conventional formalism of energy-loss functions. We then demonstrate the necessity to go beyond this formalism and present the theory of the inelastic scattering of electrons, which takes into account the effect of the kinematics of the probing particle on the excitation process (Sect. 17.3). Finally, we show how the nonlocal response to the incident light leads to a strong enhancement of the microscopic electric field at the surface and how the total exciting field can be included into an ab-initio one-step photoemission theory to describe photoyield enhancement (Sects. 17.6 and 17.7).

Original languageAmerican English
Title of host publicationSpringer Handbooks
PublisherSpringer Science and Business Media Deutschland GmbH
Pages501-530
Number of pages30
DOIs
StatePublished - 2020
Externally publishedYes

Publication series

NameSpringer Handbooks
ISSN (Print)2522-8692
ISSN (Electronic)2522-8706

Bibliographical note

Publisher Copyright:
© 2020, Springer Nature Switzerland AG.

Keywords

  • bulk scattering
  • elastic scattering
  • electron energy-loss spectroscopy (EELS)
  • electronic excitations
  • energy-loss function
  • inelastic scattering
  • photoemission spectroscopy (PES)
  • surface scattering

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