CESR in superconductors: Relevance of highT c copper oxide systems

Effect of chemical inhomogeneity in bismuth-based copper oxide superconductors

We examine the effect on the superconducting transition temperature (Tc) of chemical inhomogeneities in Bi2Sr2CuO61d and Bi2Sr2CaCu2O81d single crystals. Cation disorder at the Sr crystallographic site is inherent in these materials and strongly affects the value of Tc . Partial substitution of Sr by Ln ~Ln 5 La, Pr, Nd, Sm, Eu, Gd, and Bi! in Bi2Sr1.6Ln0.4CuO61d results in a monotonic decrease...

Search for ferromagnetic order in overdoped copper-oxide superconductors

In copper-oxides that show high-temperature superconductivity (HTS), the critical temperature (Tc) has a dome-shaped doping dependence. The cause of demise of both Tc and superfluid density ns on the overdoped side is a major puzzle. A recent study of transport and diamagnetism in a large number of overdoped La2-xSrxCuO4 (LSCO) films shows that this cannot be accounted for by disorder within th...

Charge stripes and spin correlations in copper-oxide superconductors

To obtain superconductivity in a layered copper-oxide compound, it is necessary to introduce charge carriers into the antiferromagnetic CuO2 planes. Recent neutron diffraction studies of the system La1.6−xNd0.4SrxCuO4 [1,2] provide evidence that the dopant-induced holes choose to segregate into periodically-spaced stripes which separate antiferromagnetic domains, in a manner similar to that fou...

The Cooper Pair Electrons Origination in Copper Oxide Superconductors

An unambiguous determination of the pairing electrons origination in copper oxide superconductors in necessary to understanding the origin of high-temperature superconductivity. Several years ago, several experiments have produced strong evidence for d-wave pairing symmetry. This result also rules out different from the symmetry in conventional superconductors. Using quantum chemical bond theor...

Normal state of the copper oxide high-temperature superconductors.