Positron annihilation in the high-temperature superconductor YBa2Cu3O6+

Y. C. Jean, S. J. Wang, H. Nakanishi, W. N. Hardy, M. E. Hayden, R. F. Kiefl, R. L. Meng, H. P. Hor, J. Z. Huang, C. W. Chu

Research output: Contribution to journalArticlepeer-review

121 Citations (Scopus)


Positron-annihilation lifetime and Doppler broadening energy spectra have been measured in high-temperature superconductors YBa2Cu3O6+ as a function of temperature between 10 and 293 K. The observed positron lifetime and Doppler boradening S parameter show an onset increase near the superconducting critical temperature (Tc=90 K). This variation does not exist in a similar nonsuperconducting sample that contains a saturated oxygen vacancy content. These results give evidence that the oxygen vacancy and electronic structure change play an important role for high-Tc superconductivity.

Original languageEnglish
Pages (from-to)3994-3996
Number of pages3
JournalPhysical Review B
Issue number7
Publication statusPublished - 1987

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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