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
DOI 10.1103/PhysRevB.41.11685 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | onset |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 71 | Pressure not reported | zero_resistance |
Similar papers
High-Tc superconductor YBa2Cu3O7−δ studied by positron annihilation
similarity 0.97S. J. Wang et al.
Source status unknown — claims are unverified
Positron annihilation study on Y-Ba-Cu-O high-Tc superconductors
similarity 0.96A. G. Balogh et al.
Source status unknown — claims are unverified
Bulk superconducting Y2Ba4Cu7O15−δ and YBa2Cu4O8 prepared in oxygen at 1 atm
similarity 0.95D. M. Pooke et al.
Source status unknown — claims are unverified
Transport and NMR studies of the effect of Ni substitution on superconductivity and the normal-state pseudogap in YBa2Cu4O8
similarity 0.95G. V. M. Williams et al.
Source status unknown — claims are unverified
Superconductivity and magnetism in the high-Tc superconductor YBaCuO
similarity 0.95J. Z. Sun et al.
Source status unknown — claims are unverified
Superconductivity and magnetic order in the Cu(2) planes in Fe-doped YBa2Cu4O8
similarity 0.95I. Felner et al.
Source status unknown — claims are unverified