Compton Scattering and Various ACAR Experiments in~Mg

• Authors: G. Kontrym-Sznajd
• Languages of publication: EN

Abstracts

EN

Electron-positron (e-p) momentum densities in Mg are studied using three different sets of angular correlation of annihilation radiation (ACAR) and Compton scattering experimental data. ACAR data, measured with almost identical resolution, give both a similar anisotropy of the Fermi surface and a similar e-p enhancement factor inside this surface. However, as concerns a contribution of Umklapp components of valence-electron densities there are essential differences depending on experimental data. Due to a strong dependence of such densities on different theoretical approaches describing e-p correlations, it is suggested to perform additional, high statistics and resolution ACAR measurements for Mg and analyze them as suggested in the paper.

Keywords

EN

13.60.Fz; 71.18.+y; 71.15.Mb; 71.20.-b; 78.70.Bj

Discipline

• 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)
• 71.20.-b: Electron density of states and band structure of crystalline solids
• 71.18.+y: Fermi surface: calculations and measurements; effective mass, g factor
• 71.15.Mb: Density functional theory, local density approximation, gradient and other corrections
• 13.60.Fz: Elastic and Compton scattering

• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 3
• Pages: 696-699

Dates

published

2014-03

Contributors

author

G. Kontrym-Sznajd

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences P.O. Box 937, 50-950 Wrocław 2, Poland

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Identifiers

DOI

10.12693/APhysPolA.125.696