ABSTRACT
Peculiarities in electronic transport, magneto-transport, and thermal properties clearly reveal the significant presence of electronlike quasiparticles in p-type cuprates, which possess the highest critical temperature obtainable at ambient conditions. This chapter discusses the evidence for the presence of electron in p-cuprate in association with transports and other properties. The generalization to include p-type cuprates takes more theoretical efforts. Recent experimental progress clearly demonstrates that the in-plane magnetoresistance obeys Kohler’s rule in the pseudogap phase of cuprate superconductors. The excitonic Coulomb coupling contributes to many “abnormal” and “puzzling” phenomena of cuprates in the normal (or mixed) state. Of course, cuprates are still rather different from a standard Fermi-liquid, with peculiarities such as the pseudogap and preformed pairs. In other cuprates, multilayer splitting of the conventional type helps too besides the aforementioned mechanism. The coexistence of electron and hole is already well known to n-type cuprates like NCCO, for example, by the R. L. Greene group.
