Correlation effects for electron-positron momentum density in solids

被引：57

作者：

Barbiellini, B ^{[1
]}

Hakala, M ^{[1
]}

Puska, MJ ^{[1
]}

Nieminen, RM ^{[1
]}

Manuel, AA ^{[1
]}

机构：

[1] UNIV GENEVA, DEPT PHYS, CH-1211 GENEVA 4, SWITZERLAND

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.56.7136

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A method describing the calculation of the momentum density of annihilating electron-positron pairs in solids has been developed. One-electron states, which are not perturbed by the positron, an used. The effects due to the enhancement of the electron density near the positron are taken into account by a factor depending on the electron state in the annihilating pair. This enhancement is used both for the valence and core electron states. The calculated momentum densities an in good agreement with the two-dimensional angular correlation of the annihilation radiation measurements in defect-free Cu and GaAs.

引用

页码：7136 / 7142

页数：7

共 46 条

[1] Theoretical and experimental study of positron annihilation with core electrons in solids [J].

Alatalo, M ;

Barbiellini, B ;

Hakala, M ;

Kauppinen, H ;

Korhonen, T ;

Puska, MJ ;

Saarinen, K ;

Hautojarvi, P ;

Nieminen, RM .

PHYSICAL REVIEW B, 1996, 54 (04) :2397-2409

[2] LINEAR METHODS IN BAND THEORY [J].

ANDERSEN, OK .

PHYSICAL REVIEW B, 1975, 12 (08) :3060-3083

[3]

Arponen J., 1985, Positron Annihilation. Proceedings of the Seventh International Conference, P21

[4] Increased elemental specificity of positron annihilation spectra [J].

AsokaKumar, P ;

Alatalo, M ;

Ghosh, VJ ;

Kruseman, AC ;

Nielsen, B ;

Lynn, KG .

PHYSICAL REVIEW LETTERS, 1996, 77 (10) :2097-2100

[5] PSEUDOPOTENTIALS THAT WORK - FROM H TO PU [J].

BACHELET, GB ;

HAMANN, DR ;

SCHLUTER, M .

PHYSICAL REVIEW B, 1982, 26 (08) :4199-4228

[6] Calculation of positron states and annihilation in solids: A density-gradient-correction scheme [J].

Barbiellini, B ;

Puska, MJ ;

Korhonen, T ;

Harju, A ;

Torsti, T ;

Nieminen, RM .

PHYSICAL REVIEW B, 1996, 53 (24) :16201-16213

[7] GRADIENT CORRECTION FOR POSITRON STATES IN SOLIDS [J].

BARBIELLINI, B ;

PUSKA, MJ ;

TORSTI, T ;

NIEMINEN, RM .

PHYSICAL REVIEW B, 1995, 51 (11) :7341-7344

[8] ELECTRON AND POSITRON STATES IN HGBA2CUO4 [J].

BARBIELLINI, B ;

JARLBORG, T .

PHYSICAL REVIEW B, 1994, 50 (05) :3239-3245

[9]

BERKO S, 1989, MOMENTUM DISTRIBUTIONS, P273

[10]

Berko S., 1981, POSITRON SOLID STATE, P64

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