Oxygen Content Change Characters and the Influence Superconductivity in the Doped YBCO Systems
2012 ◽
Vol 535-537
◽
pp. 1241-1246
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The YBa2Cu3-x(doped element)xO7-δ samples were prepared by solid-state reactions and studied by means of XRD, positron annihilation technique and simulation calculation. The results show the local electron density ne saturation and variations of oxygen content, which can be explained by the cluster effect. Another important new result is that the superconductivity does not depend directly on the valence electron density with different dopant. The Tc seems to lose the association with the ne variation. The dopants can be regarded as a kind of defects is similarly an adding or a losing oxygen ion. Oxygen interstitials reflect fractal distributions of dopants. The oxygen content and distribution reflect the superconductivity of the samples.
1997 ◽
Vol 166
◽
pp. 301-304
Keyword(s):
2019 ◽
Vol 484
◽
pp. 279-285
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Keyword(s):
Keyword(s):
Keyword(s):
Keyword(s):
Local electron density near the 2DES boundary formed by side-gate voltage in the quantum Hall regime
2004 ◽
Vol 22
(1-3)
◽
pp. 173-176
Keyword(s):
2021 ◽
Vol 60
(16)
◽
pp. 8905-8912