Selective enhancement of different electron populations by electron-positron attraction: application to zinc

Daniuk, S.; Kontrym‐Sznajd, G.; Rubaszek, A.; Stachowiak, H.; Mayers, J.; Walters, Philip; West, R N

doi:10.1088/0305-4608/17/6/011

Cited by 71 publications

(63 citation statements)

References 26 publications

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“…The supercell approximation was used for localized positrons first by Gupta and Siegel (1977). Also the linearized (LAPW) (Andersen, 1975) (Daniuk, 1983;Daniuk et al, 1987) and the full-potential version (FP-LAPW) (Baruah, Zope, and Kshirsagar, 1999; Tang, Hasegawa, Nagai, and Saito, 2002;Tang, Hasegawa, Nagai, Saito, and Kawazoe, 2002) have been applied. The FP-LAPW method is highly accurate and treats also the core electrons and their annihilation fully self-consistently using the true symmetry of electron and positron states.…”

Section: F Numerical Approaches For Self-consistent Calculationsmentioning

confidence: 99%

Defect identification in semiconductors with positron annihilation: Experiment and theory

2013

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Positron annihilation spectroscopy is particularly suitable for studying vacancy-type defects in semiconductors. Combining state-of-the-art experimental and theoretical methods allows for detailed identification of the defects and their chemical surroundings. Also charge states and defect levels in the band gap are accessible. In this review the main experimental and theoretical analysis techniques are described. The usage of these methods is illustrated through examples in technologically important elemental and compound semiconductors. Future challenges include the analysis of noncrystalline materials and of transient defect-related phenomena.

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Section: F Numerical Approaches For Self-consistent Calculationsmentioning

confidence: 99%

Defect identification in semiconductors with positron annihilation: Experiment and theory

2013

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“…The positron annihilation rate as a function of the momentum p of the annihilating positron-electron pair is determined from the electron and positron wave functions as 28,4 ͑p͒ϭr e…”

Section: Theorymentioning

confidence: 99%

“…29 Daniuk et al 28 have proposed a method that treats the enhancement corrections locally in real space using the jellium approximation. This method predicts both the relative deenhancement for the d electrons and the increase of the enhancement as a function of the increasing electron energy for the nearly electron-gas systems.…”

Section: Deenhancement Of D-electron Annihilationmentioning

confidence: 99%

Calculation of positron states and annihilation in solids: A density-gradient-correction scheme

et al. 1996

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The generalized gradient correction method for positron-electron correlation effects in solids ͓B. Barbiellini et al., Phys. Rev. B 51, 7341 ͑1995͔͒ is applied in several test cases. The positron lifetime, energetics, and momentum distribution of the annihilating electron-positron pairs are considered. The comparison with experiments shows systematic improvement in the predictive power of the theory compared to the local-density approximation results for positron states and annihilation characteristics. ͓S0163-1829͑96͒03824-6͔

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“…These effects are incorporated in the form of momentum, energy or density dependent enhancement factors [8][9][10][11][12] .…”

mentioning

confidence: 99%

Full-potential LAPW calculation of electron momentum density and related properties of Li

1999

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Selective enhancement of different electron populations by electron-positron attraction: application to zinc

Cited by 71 publications

References 26 publications

Defect identification in semiconductors with positron annihilation: Experiment and theory

Defect identification in semiconductors with positron annihilation: Experiment and theory

Calculation of positron states and annihilation in solids: A density-gradient-correction scheme

Full-potential LAPW calculation of electron momentum density and related properties of Li

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