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Comments on core-hole lifetime effects in deep-level spectroscopies

Almbladh, Carl-Olof LU and Minnhagen, Petter (1978) In Physical Review B 17(2). p.929-939
Abstract
he effects of a finite core-hole lifetime on deep-level spectra in solids have recently attracted much interest. We here present a solvable model which enables a detailed analysis of lifetime effects. For x-ray photoemission and x-ray absorption, our analysis gives support for the usual convolution approach where the infinite lifetime spectrum is convoluted with a Lorentzian lifetime broadening. In particular, we demonstrate the inadequacy of a recent intuitive approach which predicts a suppression of the phonon broadening for short core-hole lifetimes. This is done by testing the different theories on our model. We also show that a straightforward diagrammatic analysis leads to the same conclusion. Finally, we discuss the phonon response... (More)
he effects of a finite core-hole lifetime on deep-level spectra in solids have recently attracted much interest. We here present a solvable model which enables a detailed analysis of lifetime effects. For x-ray photoemission and x-ray absorption, our analysis gives support for the usual convolution approach where the infinite lifetime spectrum is convoluted with a Lorentzian lifetime broadening. In particular, we demonstrate the inadequacy of a recent intuitive approach which predicts a suppression of the phonon broadening for short core-hole lifetimes. This is done by testing the different theories on our model. We also show that a straightforward diagrammatic analysis leads to the same conclusion. Finally, we discuss the phonon response to the total process of core-hole creation and subsequent annihilation in an x-ray or Auger emission event. It is explained in some detail that the lifetime independence of the shake-up connected with the first step in this process is in no contradiction with the fact that the phonon system is uneffected by the total deep-level process in the limit of short core-hole lifetimes. We also analyze the process of 1s hole creation and subsequent Auger K-LL emission and give explicit expressions for this process. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
17
issue
2
pages
929 - 939
publisher
American Physical Society
external identifiers
  • Scopus:0001539644
ISSN
1550-235X
language
English
LU publication?
yes
id
0fe0b468-ebe5-44d3-8533-ee49d6aefef7 (old id 8772523)
date added to LUP
2016-02-27 01:15:33
date last changed
2016-11-20 04:31:44
@misc{0fe0b468-ebe5-44d3-8533-ee49d6aefef7,
  abstract     = {he effects of a finite core-hole lifetime on deep-level spectra in solids have recently attracted much interest. We here present a solvable model which enables a detailed analysis of lifetime effects. For x-ray photoemission and x-ray absorption, our analysis gives support for the usual convolution approach where the infinite lifetime spectrum is convoluted with a Lorentzian lifetime broadening. In particular, we demonstrate the inadequacy of a recent intuitive approach which predicts a suppression of the phonon broadening for short core-hole lifetimes. This is done by testing the different theories on our model. We also show that a straightforward diagrammatic analysis leads to the same conclusion. Finally, we discuss the phonon response to the total process of core-hole creation and subsequent annihilation in an x-ray or Auger emission event. It is explained in some detail that the lifetime independence of the shake-up connected with the first step in this process is in no contradiction with the fact that the phonon system is uneffected by the total deep-level process in the limit of short core-hole lifetimes. We also analyze the process of 1s hole creation and subsequent Auger K-LL emission and give explicit expressions for this process.},
  author       = {Almbladh, Carl-Olof and Minnhagen, Petter},
  issn         = {1550-235X},
  language     = {eng},
  number       = {2},
  pages        = {929--939},
  publisher    = {ARRAY(0xb722ee8)},
  series       = {Physical Review B},
  title        = {Comments on core-hole lifetime effects in deep-level spectroscopies},
  volume       = {17},
  year         = {1978},
}