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Sharp gap edge and determination of the fermi velocity in Y1Ba2Cu3O7−δby point contact spectroscopy

✍ Scribed by Nir Mass; D. Ilzycer; G. Deutscher; G. Desgardin; I. Monot; M. Weger

Publisher
Springer
Year
1992
Tongue
English
Weight
339 KB
Volume
5
Category
Article
ISSN
0896-1107

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Substitution on the Cu(1) sites in Y1Ba2Cu3O7−δ; evidence for distorted chains of Co and Fe atoms
✍ F. Bridges; J.B. Boyce; T. Claeson; T.H. Geballe; J.M. Tarascon 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 125 KB

X-ray absorption studies indicate that Co replaces Cu(1) in Y1Ba2Cu307-6 at low concentrations, but the CoO) sites are severely distorted. A zig-zag chain model for the Co is consistent with the observed first and second neighbor distances. A similar behavior is observed for Fe; however, Ni-doped sa