Jahn-Teller distortion of neutral divacancy in Si studied by positron annihilation spectroscopy

Y. Nagai, K. Inoue, Z. Tang, I. Yonenaga, T. Chiba, M. Saito, M. Hasegawa

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)


Jahn-Teller (JT) distortion of the diamagnetic neutral divacancy (V 20) in Si is studied by positron annihilation spectroscopy. Based on the anisotropy of electron momentum distribution around the divacancies obtained by two-dimensional angular correlation of positron annihilation radiation (2D-ACAR) technique, the preferred alignment of the divacancy in a specimen by compressing uniaxial stress along the [0 1 1] axis is detected. The direction of the alignment evidences the pairing JT distortion rather than the resonant bonding distortion, which is similar to the distortion in the singly negative divacancy (V2-).

Original languageEnglish
Pages (from-to)518-522
Number of pages5
JournalPhysica B: Condensed Matter
Publication statusPublished - 2003 Dec 31
EventProceedings of the 22nd International Conference on Defects in (ICDS-22) - Aarhus, Denmark
Duration: 2003 Jul 282003 Aug 1


  • 2D-ACAR
  • Divacancy in Si
  • Jahn-Teller distortion
  • Positron annihilation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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