Vacancy defect positron lifetimes in strontium titanate

R. A. MacKie; S. Singh; J. Laverock; S. B. Dugdale; D. J.  Keeble

doi:10.1103/PhysRevB.79.014102

Vacancy defect positron lifetimes in strontium titanate

R. A. MacKie, S. Singh, J. Laverock, S. B. Dugdale, D. J. Keeble

Research output: Contribution to journal › Article › peer-review

59 Citations (Scopus)

Abstract

The results of positron-annihilation lifetime spectroscopy measurements on undoped, electron-irradiated, and Nb-doped SrTiO3 single crystals are reported. Perfect lattice and vacancy defect positron lifetimes were calculated using two different first-principles schemes. The Sr-vacancy defect-related positron lifetime was obtained from measurements on Nb-doped, electron-irradiated, and vacuum-annealed samples. Undoped crystals showed a defect lifetime component dominated by trapping to Ti vacancy-related defects.

Original language	English
Article number	014102
Pages (from-to)	-
Number of pages	8
Journal	Physical Review B: Condensed matter and materials physics
Volume	79
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.79.014102
Publication status	Published - 2009

Keywords

ab initio calculations
niobium compounds
positron annihilation
strontium compounds
vacancies (crystal)
LA-DOPED SRTIO3
DIELECTRIC-PROPERTIES
ELECTRONIC-STRUCTURE
GRADIENT-CORRECTION
SINGLE-CRYSTALS
THIN-FILMS
CERAMICS
ANNIHILATION
SOLIDS
CHEMISTRY

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10.1103/PhysRevB.79.014102

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title = "Vacancy defect positron lifetimes in strontium titanate",

abstract = "The results of positron-annihilation lifetime spectroscopy measurements on undoped, electron-irradiated, and Nb-doped SrTiO3 single crystals are reported. Perfect lattice and vacancy defect positron lifetimes were calculated using two different first-principles schemes. The Sr-vacancy defect-related positron lifetime was obtained from measurements on Nb-doped, electron-irradiated, and vacuum-annealed samples. Undoped crystals showed a defect lifetime component dominated by trapping to Ti vacancy-related defects.",

keywords = "ab initio calculations, niobium compounds, positron annihilation, strontium compounds, vacancies (crystal), LA-DOPED SRTIO3, DIELECTRIC-PROPERTIES, ELECTRONIC-STRUCTURE, GRADIENT-CORRECTION, SINGLE-CRYSTALS, THIN-FILMS, CERAMICS, ANNIHILATION, SOLIDS, CHEMISTRY",

author = "MacKie, {R. A.} and S. Singh and J. Laverock and Dugdale, {S. B.} and Keeble, {D. J.}",

year = "2009",

doi = "10.1103/PhysRevB.79.014102",

language = "English",

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T1 - Vacancy defect positron lifetimes in strontium titanate

AU - MacKie, R. A.

AU - Singh, S.

AU - Laverock, J.

AU - Dugdale, S. B.

AU - Keeble, D. J.

PY - 2009

Y1 - 2009

N2 - The results of positron-annihilation lifetime spectroscopy measurements on undoped, electron-irradiated, and Nb-doped SrTiO3 single crystals are reported. Perfect lattice and vacancy defect positron lifetimes were calculated using two different first-principles schemes. The Sr-vacancy defect-related positron lifetime was obtained from measurements on Nb-doped, electron-irradiated, and vacuum-annealed samples. Undoped crystals showed a defect lifetime component dominated by trapping to Ti vacancy-related defects.

AB - The results of positron-annihilation lifetime spectroscopy measurements on undoped, electron-irradiated, and Nb-doped SrTiO3 single crystals are reported. Perfect lattice and vacancy defect positron lifetimes were calculated using two different first-principles schemes. The Sr-vacancy defect-related positron lifetime was obtained from measurements on Nb-doped, electron-irradiated, and vacuum-annealed samples. Undoped crystals showed a defect lifetime component dominated by trapping to Ti vacancy-related defects.

KW - ab initio calculations

KW - niobium compounds

KW - positron annihilation

KW - strontium compounds

KW - vacancies (crystal)

KW - LA-DOPED SRTIO3

KW - DIELECTRIC-PROPERTIES

KW - ELECTRONIC-STRUCTURE

KW - GRADIENT-CORRECTION

KW - SINGLE-CRYSTALS

KW - THIN-FILMS

KW - CERAMICS

KW - ANNIHILATION

KW - SOLIDS

KW - CHEMISTRY

U2 - 10.1103/PhysRevB.79.014102

DO - 10.1103/PhysRevB.79.014102

M3 - Article

SN - 1098-0121

VL - 79

SP - -

JO - Physical Review B: Condensed matter and materials physics

JF - Physical Review B: Condensed matter and materials physics

IS - 1

M1 - 014102

ER -

Vacancy defect positron lifetimes in strontium titanate

Abstract

Keywords

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