Effect of the Positron Distribution on the Electron-Positron Momentum Density Calculated for SiC

• Authors: A. Rubaszek
• Languages of publication: EN

Abstracts

EN

To interpret positron annihilation data in solids in terms of the electron momentum density, both the electron-positron interaction and positron distribution have to be considered explicitly. In the present work the influence of the shape of the positron wave function on the calculated electron-positron momentum density in elemental SiC is discussed. It is shown that the form of the positron distribution in the Wigner-Seitz cell has a considerable effect on the resulting annihilation characteristics. Calculations were performed for SiC of 3C diamond structure within the linear muffin-tin orbital-atomic spheres approximation method.

Keywords

EN

78.70.Bj; 71.15.Ap; 71.20.Mq

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)
• 71.15.Ap: Basis sets (LCAO, plane-wave, APW, etc.) and related methodology (scattering methods, ASA, linearized methods, etc.)
• 71.20.Mq: Elemental semiconductors

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 5
• Pages: 1501-1506

Dates

published

2008-05

received

2007-09-03

Contributors

author

A. Rubaszek

• W. Trzebiatowski Institute of Low Temperatures and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2, Poland

References

• 1. For review and references see e.g. http://www.ioffe.rssi.ru/SVA/NSM/, Semicond/SiC/bandstr.html
• 2. For review see e.g. M.J. Puska, R.M. Nieminen, Rev. Mod. Phys. 66, 841 (1994);R.M. Nieminen, in: Positron Spectroscopy of Solids, Eds. A. Dupasquier, A.P. Mills, IOS Press, Amsterdam 1996, p. 443;S. Berko, in: Positron Solid State Physics, Eds. W. Brandt, A. Dupasquier, North-Holland, Amsterdam 1983, p. 64: R.M. Nieminen, ibid., p. 105
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Identifiers

DOI

10.12693/APhysPolA.113.1501