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Understanding electron-positron momentum densities in solids: effect of the positron distribution
- Source :
- Nukleonika, Vol 60, Iss 4, Pp 759-763 (2015)
- Publication Year :
- 2015
- Publisher :
- Walter de Gruyter GmbH, 2015.
-
Abstract
- The influence of the positron distribution on the electron-positron (e-p) momentum densities (MDs) is studied in terms of the l (l = s, p, d, f) character of the initial electronic state. The effect of the positron is discussed for momenta in the extended and reduced zone scheme on the example of Al (simple metal), Cu (metal with almost filled d shell), and Cr (transition metal). Present result indicates a weak sensitivity of the e-p MD inside the central Fermi surface to the positron charge density for the delocalized s and p electrons. In the case of d states, the effect of the positron on the relevant contribution to the e-p MD directly reflects the degree of localization of d electrons in the electron density of states.
- Subjects :
- Physics
Nuclear and High Energy Physics
Momentum (technical analysis)
Distribution (number theory)
Science
Positron Lifetime Spectroscopy
positron annihilation
Electron
Condensed Matter Physics
positron states
Nuclear physics
Positron
Nuclear Energy and Engineering
electronic band structure
Physics::Accelerator Physics
Positron emission
Safety, Risk, Reliability and Quality
Electronic band structure
Waste Management and Disposal
Instrumentation
Positron annihilation
Subjects
Details
- ISSN :
- 00295922
- Volume :
- 60
- Database :
- OpenAIRE
- Journal :
- Nukleonika
- Accession number :
- edsair.doi.dedup.....8e10565c998bd4cc136d1d3ebeb2af7f