Positron-annihilation studies on the YBa2Cu4O8 superconductor

C. S. Sundar, A. Bharathi, Y. C. Jean, P. H. Hor, R. L. Meng, Y. Y. Xue, Z. J. Huang, C. W. Chu

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Positron-lifetime and Doppler-broadened annihilation-radiation line-shape parameter S in YBa2Cu4O8 are observed to decrease with temperature below Tc. The calculation of the positron-density distribution shows that the maximum of the positron density is in the region between the Cu-O double chains. The correlation between the temperature dependence of annihilation parameters and the positron-density distribution is discussed. The decrease in annihilation parameters below Tc is understood in terms of a local electron transfer from the CuO2 layers to the Cu-O chains in the superconducting state.

Original languageEnglish
Pages (from-to)11685-11688
Number of pages4
JournalPhysical Review B
Volume41
Issue number16
DOIs
Publication statusPublished - 1990

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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