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Properties of electron self-energies and their role in electron spectroscopies

Hedin, Lars LU (1991) In Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment A308(1-2). p.169-177
Abstract
The GW approximation for the self-energy connected with the one-electron Green's function has been very successful in predicting band structures for a large class of semiconductors and insulators. The physical basis for this approximation and general features of its nonlocality are discussed, as well as possible improvements. Besides quasiparticle energies the self-energy also gives the intrinsic part of the photoelectron spectrum. In general, however, a full description of experimental spectra measured with synchrotron radiation, such as photoemission, Auger spectra and EXAFS, cannot be given by the one-electron Green's function. A new theoretical approach to synchrotron radiation spectroscopies is given in terms of the coupling functions... (More)
The GW approximation for the self-energy connected with the one-electron Green's function has been very successful in predicting band structures for a large class of semiconductors and insulators. The physical basis for this approximation and general features of its nonlocality are discussed, as well as possible improvements. Besides quasiparticle energies the self-energy also gives the intrinsic part of the photoelectron spectrum. In general, however, a full description of experimental spectra measured with synchrotron radiation, such as photoemission, Auger spectra and EXAFS, cannot be given by the one-electron Green's function. A new theoretical approach to synchrotron radiation spectroscopies is given in terms of the coupling functions involved in the GW approximation and on-the-energy-shell one-electron Green's functions.(14 refs) (Less)
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organization
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type
Contribution to journal
publication status
published
subject
in
Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
volume
A308
issue
1-2
pages
169 - 177
publisher
Elsevier
external identifiers
  • Scopus:0041469991
ISSN
0167-5087
DOI
10.1016/0168-9002(91)90619-2
language
English
LU publication?
yes
id
bef1a822-2f4a-4cfd-84b6-518c80b1e312 (old id 8821026)
date added to LUP
2016-03-01 09:38:50
date last changed
2016-10-13 04:33:59
@misc{bef1a822-2f4a-4cfd-84b6-518c80b1e312,
  abstract     = {The GW approximation for the self-energy connected with the one-electron Green's function has been very successful in predicting band structures for a large class of semiconductors and insulators. The physical basis for this approximation and general features of its nonlocality are discussed, as well as possible improvements. Besides quasiparticle energies the self-energy also gives the intrinsic part of the photoelectron spectrum. In general, however, a full description of experimental spectra measured with synchrotron radiation, such as photoemission, Auger spectra and EXAFS, cannot be given by the one-electron Green's function. A new theoretical approach to synchrotron radiation spectroscopies is given in terms of the coupling functions involved in the GW approximation and on-the-energy-shell one-electron Green's functions.(14 refs)},
  author       = {Hedin, Lars},
  issn         = {0167-5087},
  language     = {eng},
  number       = {1-2},
  pages        = {169--177},
  publisher    = {ARRAY(0xaa040b0)},
  series       = {Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment},
  title        = {Properties of electron self-energies and their role in electron spectroscopies},
  url          = {http://dx.doi.org/10.1016/0168-9002(91)90619-2},
  volume       = {A308},
  year         = {1991},
}