Abstract
The authors present a series of calculations for positron states and lifetimes in perfect and defected YBa2Cu3O7-x using an atomistic model. A simple relationship is found between the lifetime and the oxygen deficiency. The results suggest that the long-lived component resolved in lifetime spectra is associated with metal vacancies and/or metal-oxygen-vacancy complexes, while oxygen vacancies are found to be only shallow positron traps. The authors give an interpretation of positron lifetime experiments in terms of defects, oxygen-deficient domains and structural changes in the material.
Original language | English |
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Pages (from-to) | 3727-3732 |
Number of pages | 6 |
Journal | Journal of physics: Condensed matter |
Volume | 1 |
Issue number | 23 |
DOIs | |
Publication status | Published - 1989 |
MoE publication type | A1 Journal article-refereed |