Properties of electron self-energies and their role in electron spectroscopies
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8821026
- author
- Hedin, Lars LU
- organization
- publishing date
- 1991
- 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
- additional info
- DOI: 10.1016/0168-9002(91)90619-2
- id
- bef1a822-2f4a-4cfd-84b6-518c80b1e312 (old id 8821026)
- date added to LUP
- 2016-04-04 09:37:23
- date last changed
- 2021-02-07 06:02:00
@article{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 = {{Elsevier}},
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}},
doi = {{10.1016/0168-9002(91)90619-2}},
volume = {{A308}},
year = {{1991}},
}