Resistivities of ceramic and single-crystalline superconducting oxides to 1100K: What do they tell us?
✍ Scribed by M. Gurvitch; A.T. Fiory; L.S. Schneemeyer; R.T. Cava; G.P. Espinosa; J.V. Waszczak
- Book ID
- 103942960
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 160 KB
- Volume
- 153-155
- Category
- Article
- ISSN
- 0921-4534
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✦ Synopsis
Resistivities p(T) of ceramic samples of Lal.825Sr0.175CuO 4 (LSCO) and both ceramic and single-crystalline (a-b plane, containing micro-twins) samples of YBa2Cu307 (YBCO) were measured from Tc to 1100K. The observed absence of saturation in the linear parts of p(T) implies weak electron-phonon coupling in both superconductors, thus excluding the possibility of phonon-mediated superconductivity. Oxygen desorption causes faster than linear dependence at T>800K in YBCO crystals (compared to T>600K for ceramics), demonstrating that inelastic scattering is linear in T up to at least 800K.