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Andreev reflection in natural grain boundaries of polycrystalline high-Tcsuperconductor La1.85Sr0.15CuO4

✍ Scribed by M. I. Petrov; D. A. Balaev; D. M. Gokhfel’d; K. A. Shaikhutdinov


Book ID
110135069
Publisher
SP MAIK Nauka/Interperiodica
Year
2003
Tongue
English
Weight
64 KB
Volume
45
Category
Article
ISSN
1063-7834

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High-energy phonon dispersion in La1.85S
✍ A.H. Moudden; P.M. Gehring; G. Shirane; M. Matsuda; L. Vasiliu-Doloc; B. Hennion 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 189 KB

We have measured two phonon-dispersion curves above 50meV in a superconducting (T~ = 33 K) single crystal of Lal.85Sro.tsCuO4. In the normal phase (T =45 K), we show that the A, mode compatible with the Raman A, g (425 cm -1) mode is weakly dispersive, falling from 53.7 meV at the zone center to abo