A positron annihilation study of the Y-Ba-Cu-O compounds

20 November 1987

journal article
Published by IOP Publishing in Journal of Physics C: Solid State Physics

Vol. 20 (32) , L923-L927
https://doi.org/10.1088/0022-3719/20/32/009

Abstract

The Doppler broadening technique of positron annihilation was used to investigate the electronic structure of the Y-Ba-Cu-O compounds in the range 85-300 K. Anomalous behaviour of the lineshape parameters with a change in temperature was observed, which shows a very distinct difference from the behaviour of superconducting alloys. The results suggest that the mechanism of the new oxide superconductors is different from that in the alloy systems.

Keywords

This publication has 7 references indexed in Scilit:

Ferroelectricity in high-T_csuperconductors
Journal of Physics C: Solid State Physics, 1987
The effects of distortions of crystal lattices on superconductivity in the Y-Ba-Cu-O system
Journal of Physics C: Solid State Physics, 1987
Isotope Effect in the High- $T_{c}$ Superconductors ${Ba}_{2}$ Y ${Cu}_{3}$ $O_{7}$ and ${Ba}_{2}$ Eu ${Cu}_{3}$ $O_{7}$
Physical Review Letters, 1987
Search for Isotope Effect in Superconducting Y-Ba-Cu-O
Physical Review Letters, 1987
Evidence for a Peierls distortion in ${La}_{2}$ ${CuO}_{4}$ from vibrational spectroscopy
Physical Review Letters, 1987
Electronic band properties and superconductivity in ${La}_{2 - y}$ $X_{y}$ ${CuO}_{4}$
Physical Review Letters, 1987
Positron Annihilation in Superconducting Lead
Physical Review B, 1966