Resistivities of Ceramic and Single-Crystalline Superconducting Oxides to 1100k: What Do They Tell Us?
Resistivities ϱ(T) of ceramic samples of La1.825Sr0.175CuO4 (LSCO) and both ceramic and single-crystalline (a-b plane, containing micro-twins) samples of YBa2Cu3O7 (YBCO) were measured from Tc to 1100K. The observed absence of saturation in the linear parts of ϱ(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 〉 800 K in YBCO crystals (compared to T 〉 600 K for ceramics), demonstrating that inelastic scattering is linear in T up to at least 800 K.
MSU Digital Commons Citation
Gurvitch, Michael; Fiory, Anthony T.; Schneemeyer, Lynn; Cava, Robert J.; Espinosa, Gerald P.; and Waszczak, Joseph V., "Resistivities of Ceramic and Single-Crystalline Superconducting Oxides to 1100k: What Do They Tell Us?" (1988). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 257.