Localized Positronium‐Like States in Ionic Crystals

Boev, O. V.; Arefiev, K. P.

doi:10.1002/pssb.2221060208

Cited by 6 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is similar to the well known Jastrow approximation 14 for the pair wave function F. The adequacy of the Jastrow approximation can be tested by considering a model Hamiltonian of a positron-electron pair in a Coulomb field produced by a point charge Z eff . By using the variational Monte Carlo in the Jastrow approximation, 15 good agreement with a more accurate energy calculation employing Hylleraas-type wave functions 16 is obtained for 0.5ϽZ eff Ͻ1.…”

Section: Theorymentioning

confidence: 65%

Theoretical and experimental study of positron annihilation with core electrons in solids

et al. 1996

View full text Add to dashboard Cite

A theory for calculating the momentum distribution of annihilating positron-electron pairs in solids is presented. To test the theory, momentum distributions are measured by the Doppler broadening of the annihilation radiation for several bulk metals and semiconductors, as well as for semiconductor alloys and for positrons trapped at vacancies in semiconductors. The theory is based on a two-particle description of the annihilating electron-positron pair. Then, the electron-positron correlation effects, i.e., the enhancement of the electron density at the positron, depend on the electronic state in question. The theory is suited for calculating the high-momentum part of the annihilation spectrum that arises from the core electrons and which can be measured by the Doppler broadening using coincidence techniques. The ideas of the theory are justified by a good agreement between theory and experiment in the case of positron annihilation in undefected bulk lattices. Moreover, the comparison of the theoretical and experimental spectra for alloys and vacancy defects tests the theoretical description for the positron distribution in delocalized and localized states, respectively. ͓S0163-1829͑96͒04327-5͔

show abstract

Section: Theorymentioning

confidence: 65%