Superconductivity near Charge Transfer Instability in CuO2 Structure
Abstract
The possible symmetries of superconductivity is studied on a system near charge transfer instability in CuO2 layer structure for a case where the Cu sites do not have magnetic moment. This case corresponds either to ignore the existence of magnetic moments in actual high Tc Cu-oxides by focusing only on charge fluctuations or to consider the ground state configurations of d8 or d10 at the Cu-sites. By deriving effective interaction processes, which become important near the charge transfer instability, the critical temperatures have been estimated as a function of the doping rate, δ, based on weak-coupling approximation. It is seen that they have characteristic δ-dependence depending on symmetry.
- Publication:
-
Journal of the Physical Society of Japan
- Pub Date:
- April 1991
- DOI:
- 10.1143/JPSJ.60.1306
- Bibcode:
- 1991JPSJ...60.1306M
- Keywords:
-
- Charge Transfer;
- Copper Oxides;
- Crystal Structure;
- High Temperature Superconductors;
- Spin-Orbit Interactions;
- Superconductivity;
- Crystal Lattices;
- Doped Crystals;
- Hamiltonian Functions;
- Holes (Electron Deficiencies);
- Orbitals;
- Solid-State Physics