Recent Developments of the Bloch-Modified Ladder Theory

• Authors: H. Sormann
• Languages of publication: EN

Abstracts

EN

One of the possible theoretical approaches for desribing the physics of electron-positron pairs in the inhomogeneous electron gas is the so-called "quasi-free" Bloch-modified ladder theory. Despite the success of this approach, it contains two very serious deficiencies, namely the complete neglect of the Bloch character of the electron and positron scattering states and of the electron-positron interaction potential. In this contribution, the importance of these Bloch effects for the Bloch-modified ladder theory results, especially for the momentum dependence of the positron enhancement in d-band metals, is demonstrated for the first time.

Keywords

EN

78.70.Bj; 71.25.Pi

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)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 83
• Issue: 3
• Pages: 381-390

Dates

published

1993-03

Contributors

author

H. Sormann

• Institut für Kernphysik, Technische Universität Graz, Petersgasse 16, 8010 Graz, Austria

Identifiers

DOI

10.12693/APhysPolA.83.381