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

✍ Scribed by Y. Nagai; K. Inoue; Z. Tang; I. Yonenaga; T. Chiba; M. Saito; M. Hasegawa

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
420 KB
Volume
340-342
Category
Article
ISSN
0921-4526

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✦ Synopsis

Jahn-Teller (JT) distortion of the diamagnetic neutral divacancy ðV 0 2 Þ in Si is studied by positron annihilation spectroscopy. Based on the anisotropy of electron momentum distribution around the divacancies obtained by twodimensional 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 ðV À 2 Þ:

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