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Percolation and superconducting properties of ceramic insulator–superconductor composite Ba2YNbO6–YBa2Cu3O7–δ

✍ Scribed by Paulose, K. V. ;Jayaraj, M. K.

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
346 KB
Volume
142
Category
Article
ISSN
0031-8965

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We have measured the electron momentum density in both insulating PrBa 2 Cu 3 O 7Ϫd and superconducting YBa 2 Cu 3 O 7Ϫd : We find a remarkable difference in the anisotropy of the momentum density, even though LDA based calculations predict similar behaviour for both. Our results can be explained as