Study of Defects in GeTe and (GeTe)_{1-x}(AgBiTe_2)_x Solid Solutions by Positrons

• Authors: M. Misheva , I. Avramova , St. Plachkova , N. Djourelov
• Languages of publication: EN

Abstracts

EN

Positron lifetimes and Doppler broadening of the annihilation line measurements were performed to study the vacancy type defects in polycrystalline GeTe and (GeTe)_{(1-x)}(AgBiTe_2)_x (x=0,0.03,0.05,0.1,0.15,0.2, and 1) solid solutions. The values of lifetimes obtained are explained as due to positron and positronium saturated trapping at vacancies and vacancy clusters. The interdependence between mean positron lifetime and hole concentration is discussed.

Keywords

EN

78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 3-4
• Pages: 423-428

Dates

published

2001-03/04

received

2000-09-18

Contributors

author

M. Misheva

• Sofia University, Faculty of Physics, 5 J. Bouchier Blvd, 1164, Sofia, Bulgaria

author

I. Avramova

• Sofia University, Faculty of Physics, 5 J. Bouchier Blvd, 1164, Sofia, Bulgaria

author

St. Plachkova

• Sofia University, Faculty of Physics, 5 J. Bouchier Blvd, 1164, Sofia, Bulgaria

author

N. Djourelov

• Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko shosse, 1784, Sofia, Bulgaria

References

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Identifiers

DOI

10.12693/APhysPolA.99.423