Positron annihilation in graphite and graphite intercalation compounds

Riichiro Saito, Nobuyuki Shima, Hiroshi Kamimura

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Positron annihilation rate in graphite is calculated from the first principles. First, the potential for a positron is obtained from the local charge density of electrons, which is calculated self-consistently by the numerical basis set LCAO Xα band calculation. Then, the wave function of a positron in this potential is obtained in the LCAO scheme, too. The positron annihilation rate of two dimensional angular correlation annihilation radiation (2D-ACAR) is calculated as a function of the momentum. The sum of the contribution of each valence band shows a structure which reflects the Bloch orbitals of the electrons and positrons. These results are compared with the experimental results of two dimensional electron momentum distribution in graphite. The agreement between theory and experiments is shown to be satisfactory.

Original languageEnglish
Pages (from-to)217-222
Number of pages6
JournalSynthetic Metals
Volume23
Issue number1-4
DOIs
Publication statusPublished - 1988 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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