Influence of Many-Body Effects in Real Metals on Electron-Positron Momentum Distributions

• Authors: E. Boroński
• Languages of publication: EN

Abstracts

EN

It is shown that if one takes into account the effective mass of the electron, which in real structures is actually different than the free electron mass, the electron and positron self-energy effects may result in flatter and smaller enhancement of the electron-positron momentum distribution. Thus, the many-body effects mentioned above, among other reasons like e.g. influence of lattice potential on electron and positron wave functions, can be responsible for decreasing of the discontinuity on the Fermi momentum and a greater smearing of the Fermi surface seen in several angular correlation of positron annihilation radiation experiments.

Keywords

EN

78.70.Bj; 71.18.+y; 71.60.+z; 71.15.Mb; 71.10.Ca

Discipline

• 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)
• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 71.18.+y: Fermi surface: calculations and measurements; effective mass, g factor
• 71.10.Ca: Electron gas, Fermi gas
• 71.15.Mb: Density functional theory, local density approximation, gradient and other corrections

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 3
• Pages: 706-709

Dates

published

2014-03

Contributors

author

E. Boroński

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

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Identifiers

DOI

10.12693/APhysPolA.125.706