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 language | English |
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Pages (from-to) | 11685-11688 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 41 |
Issue number | 16 |
DOIs | |
Publication status | Published - 1990 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics