In order to elucidate the relationship between the pseudogap and high-Tc superconductivity, the characteristic pseudogap temperature T in Bi2Sr2CaCu2O8+δ system has been systematically evaluated as a function of doping, especially focusing on its overdoped region, by measuring the out-of-plane resistivity ρc. Overdoped samples have been prepared by annealing TSFZ-grown Bi2Sr2CaCu2O8+δ single crystals under the high oxygen pressures (990 kgf/cm2). At a zero field, the ρc showed a metallic behavior down to T c(=62K), while under the magnetic fields of over 3 T, ρc showed typical upturn behavior from around 65 K upon decreasing temperature. This result suggests that the pseudogap and superconductivity are different phenomena.
- Out-of-plane resistivity
- Superconductive fluctuation
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering