Possible highTc superconductivity in the Ba−La−Cu−O system

@article{Bednorz1986PossibleHS,
  title={Possible highTc superconductivity in the Ba−La−Cu−O system},
  author={J. Georg Bednorz and K. Alex M{\"u}ller},
  journal={Zeitschrift f{\"u}r Physik B Condensed Matter},
  year={1986},
  volume={64},
  pages={189-193}
}
  • J. Bednorz, K. Müller
  • Published 1 June 1986
  • Materials Science, Physics
  • Zeitschrift für Physik B Condensed Matter
Metallic, oxygen-deficient compounds in the Ba−La−Cu−O system, with the composition BaxLa5−xCu5O5(3−y) have been prepared in polycrystalline form. Samples withx=1 and 0.75,y>0, annealed below 900°C under reducing conditions, consist of three phases, one of them a perovskite-like mixed-valent copper compound. Upon cooling, the samples show a linear decrease in resistivity, then an approximately logarithmic increase, interpreted as a beginning of localization. Finally an abrupt decrease by up to… Expand
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References

SHOWING 1-10 OF 19 REFERENCES
The oxygen defect perovskite BaLa4Cu5O13.4, a metallic conductor
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Preparation of Superconducting BaPb1-xBixO3 Thin Films by RF Sputtering
Superconducting BaPb1-xBixO3 thin films were successfully prepared by RF diode sputtering with a relatively high deposition rate of 50-120 A/min and subsequent heat treatments above 500 °C. Their… Expand
Possibility of insulator to superconductor phase transition
2014 A phase diagram is postulated where the ground-state of a strongly coupled electron-phonon system is a bipolaronic insulator beyond a critical coupling strength. This opens up the possibility of… Expand
Two-Band Superconductivity in Nb-Doped SrTi O 3
Tunneling measurements have been performed on Nb-doped and reduced superconducting SrTi${\mathrm{O}}_{3}$. Beyond a certain carrier concentration, when a second conduction band gets filled, a… Expand
Observation of Grain Boundary Josephson Current in BaPb 0.7 Bi 0.3 O 3 Films
The grain boundaries of superconducting BaPb0.7Bi0.3O3 sputtered thin films were found to work as tunnelling barriers and to result in the Josephson effect. The current-voltage characteristics of the… Expand
High temperature superconductivity in the LiTiO ternary system
Abstract The first high temperature superconducting oxide compound is reported. The compound is Li 1+x Ti 2−x O 4 and has the face-centered cubic spinel structure, with a o ≊ 8.40 A . The transition… Expand
Phase diagram of the (LaAlO3)1−x (SrTiO3)x solid-solution system, for x ≤ 0.8
Abstract Mixed LaAlO 3 -SrTiO 3 single crystals have been grown by using flame fusion, starting from homogeneously synthesized solid-solution powders. X-ray powder diffraction of the latter show the… Expand
Inhomogeneous superconducting transitions in granular Al
Granular Al films have been measured in a microwave cavity at 9.4 GHz together with their dc resistance, R(T). The change in resonant frequency is proportional to the number of superconducting… Expand
Electronic- and crystal-structure effects on superconductivity in the BaPb/sub 1-x/Bi/sub x/O/sub 3/ system
Self-consistent, scalar-relativistic, linear-augmented-plane-wave electronic-structure calculations have been carried out for the… Expand
Microwave study of granular superconducting Al films
Abstract Microwave absorption and frequency shift measurements in the normal and in the superconducting state are presented for a metallic type AlAl2O3 film. The results are explained by simple… Expand
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