Positron states in YBa2Cu3O7-x

K. O. Jenson*, R. M. Nieminen, M. J. Puska

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

61 Citations (Scopus)


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 languageEnglish
Pages (from-to)3727-3732
Number of pages6
JournalJournal of physics: Condensed matter
Issue number23
Publication statusPublished - 1989
MoE publication typeA1 Journal article-refereed


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