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 | |
| 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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