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Comments on core-ho...
Comments on core-hole lifetime effects in deep-level spectroscopies
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- Almbladh, Carl-Olof (författare)
- Lund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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Minnhagen, Petter (författare)
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(creator_code:org_t)
- 1978
- 1978
- Engelska.
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Ingår i: Physical Review B. - 1550-235X. ; 17:2, s. 929-939
- Relaterad länk:
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https://lup.lub.lu.s...
Abstract
Ämnesord
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- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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