Suppression and restoration of superconductivity in PrBa_2Cu_3O_7 (a mini-review).

摘要

I discuss the the physics of superconductivity and conductivity suppression in Pr-doped REBa_2Cu_3O_7 superconductors, and point out the experiments that indicate Pr(f)-O(p) hybridization as the casue of such suppression. I also show on a qualitative level how the existing experimental facts about this system are described by the hybridization model.