One of the common characteristics on the high T_c oxide superconductors is that there are Cu-O planes in their structures. It has been shown by a great number of studies that the Cu-O plane plays an important role for...One of the common characteristics on the high T_c oxide superconductors is that there are Cu-O planes in their structures. It has been shown by a great number of studies that the Cu-O plane plays an important role for the superconductivity in these layered cuprates. In order to understand the nature of the Cu-O plane and to explore the superconducting mechanism of these materials, studies of substitution for copper sites have been展开更多
Nonequilibrium effect due to the imbalance in the number of the ? and ? spin electrons has been studied for the tunneling currents in the ferromagnet-insulator-superconductor (FIS) tunneling junctions within a phenome...Nonequilibrium effect due to the imbalance in the number of the ? and ? spin electrons has been studied for the tunneling currents in the ferromagnet-insulator-superconductor (FIS) tunneling junctions within a phenomenological manner. It has been stated how the nonequilibrium effect should be observed in the spin-polarized quasiparticle tunneling currents, and pointed out that the detectable nonequilibrium effect could be found in the FIS tunneling junction at 77 K using HgBa2Ca2Cu3O8+? (Hg-1223) high-Tc superconductor rather than Bi2Sr2CaCu2O8+? (Bi-2212) one.展开更多
基金Project supported by the National Center for ResearchDevelopment on Superconductivity
文摘One of the common characteristics on the high T_c oxide superconductors is that there are Cu-O planes in their structures. It has been shown by a great number of studies that the Cu-O plane plays an important role for the superconductivity in these layered cuprates. In order to understand the nature of the Cu-O plane and to explore the superconducting mechanism of these materials, studies of substitution for copper sites have been
文摘Nonequilibrium effect due to the imbalance in the number of the ? and ? spin electrons has been studied for the tunneling currents in the ferromagnet-insulator-superconductor (FIS) tunneling junctions within a phenomenological manner. It has been stated how the nonequilibrium effect should be observed in the spin-polarized quasiparticle tunneling currents, and pointed out that the detectable nonequilibrium effect could be found in the FIS tunneling junction at 77 K using HgBa2Ca2Cu3O8+? (Hg-1223) high-Tc superconductor rather than Bi2Sr2CaCu2O8+? (Bi-2212) one.
