Anisotropy in the positron 2D angular correlation of annihilation radiation for singly negative divacancies in Si

Z. Tang, M. Hasegawa, T. Chiba, M. Saito, A. Kawasuso, Z. Q. Li, R. T. Fu, T. Akahane, Y. Kawazoe, S. Yamaguchi

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

Interesting features of positron two-dimensional angular correlation of annihilation radiation (2D-ACAR) distribution for singly negative divacancies in Si are studied experimentally and theoretically. Anisotropy of the distribution is successfully detected for a specimen with aligned divacancies and is well reproduced by first-principles calculations based on the two-component density-functional theory. The present calculation demonstrates that the anisotropy reflects the characteristic distribution of electrons around the divacancies, indicating that the 2D-ACAR is an effective tool to provide microscopic information on vacancy-type defects.

Original languageEnglish
Pages (from-to)2236-2239
Number of pages4
JournalPhysical Review Letters
Volume78
Issue number11
DOIs
Publication statusPublished - 1997 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Anisotropy in the positron 2D angular correlation of annihilation radiation for singly negative divacancies in Si'. Together they form a unique fingerprint.

Cite this