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Identification of vacancy-type defects in ZnTe using positron annihilation spectroscopy

✍ Scribed by Hamid, A. S. ;Shaban, H. ;Mansour, B. A. ;Uedono, A.

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
185 KB
Volume
202
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

The species of defects in Mg~0.5~Zn~0.5~Te, Li‐doped and P‐doped ZnTe samples were investigated by using positron‐based experiments. The positron lifetime experiments along with the atomic superposition (AT‐SUP) method were used to predict the positron trapping centers in the samples. The results of lifetime of positron were combined with the 2D angular correlation of annihilation radiation (ACAR) experiments to get information on the electronic structure of these defects. The momentum density distributions permitted the vacancy‐type defect to be distinguished in each sample. In addition, the results of the 2D‐ACAR experiments disclosed a relaxation of the atoms around the vacancy in the P‐doped ZnTe sample. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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