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

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12 Citations (Scopus)


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
Issue number16
Publication statusPublished - 1990

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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