Hall constants (RH) at 300 K of three families of CuO-based superconductors are presented—the 123 YBaCuO with Fe substitution, the 2212 and 2223 Bi systems with Pb, Gd, Nd. Sm substitutions. In all these systems.RH is positive indicating hole conductivity.Tc increases initially as the hole density (p=1/RHe) increases and shows a maximum. Each family shows a maximum value ofTc but at different values ofp. These data along with the observation ofn-type conductivity in NdCeCuO are discussed in the light of certain models.
Volume 45, 2022
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
Click here for Editorial Note on CAP Mode